I have thought up two potential story arcs to go through if I continue the story. I would like you readers to choose which one you would like to read. Both are events that happen in the story, but depending on which one you choose, Terry might not become Batman Beyond(as Dick is still alive to be the normal Batman) for a while. I am going to give a brief description of each arc so you can decide properly.
...
Arc 1: Death Bat
This arc starts only a few weeks after the first chapter. When Terry asks Dick why Damian seems so detached, as the day Martha arrived was the only time in the past few months that he entered the Batcave at all, Dick tells him that for the past four years, Damian had been a part of a secret group of heroes that Bruce had created fifteen years before Damian joined(so nineteen years before Damian holed himself up in the manor), called the Omega Squad. He tells Terry that the reason Damian is acting the way he is is because on their last mission, one of his teammates died. Damian felt it was his fault as he was placed in charge of the mission, though members of the Justice League view the death for what it really was, a sacrifice made by one to save thousands.
While Damian is taking it hard, Dick mentions that other members of Omega Squad are taking it harder. Those taking it the hardest are Wendy Quinzel;aka Waxer, the twin sister of the deceased, who West, aka Wesley Quinzel, Wendy's counterpart from another Earth and one of the founding members of Bruce's Omega Squad, warns might be on the verge of becoming the new Harley Quinn, and her alignment when that happens is still unclear, as she is still the daughter of the Joker, who died before she was born, and Alan Straeth; aka Energize, the boyfriend of the deceased, who seemed to have disappeared completely after the event, as he was thought to have been traumatized after watching the event happen firsthand.
Damian is later convinced to don his Robin uniform once again after viewing a news broadcast from Metropolis showing Lexcorp encased in a Kryptonite force field with Superman floating a distance away while what news copters are able to get a view of Lex's office manage to catch a glimpse of a new Bat killing Luthor before escaping through some unknown means.
When the Bat arrives at the Wayne Enterprises Shipping Yard, he is met by Dick, Damian, surprisingly, Jason and Martha. The four of them battle the Bat, but Damian is the only one who actually lands a blow. The strike actually takes his mask(not cowl, mask, and a full face mask at that, with Bat ears included) off, revealing that the new Bat, who calls himself Death Bat, is actually Alan. The shear shock of who it is distracts Damian long enough for Alan to grab his mask and escape.
Death Bat fights two others before he's inevitably captured and held in the Batcave. The first being West, it is the only time that a founding member of Omega Squad and a second generation member will ever fight. The fight between these two shows what happens when you pit someone trained by the top members of the Justice League against someone who was not only trained from childhood to kill Kryptonians without using Kryptonite, but ultimately marries and has children with Kara Zor-El. His second opponent is Wendy, who actually did become the knew Harley Quinn. Luckily for the Squad and the League, she still fights for justice. The fight between Alan and Wendy is more dialogue driven than the fight with Wesley, as the two argue over how the death of Wendy's sister should really be handled. The turning point of their fight is when Alan shoots a Batarang into the jugular of a criminal Wendy had just apprehended, causing her to wail on him with her hammer until Tim arrives to hold her back so Dick can cuff him and take him away.
After that, Terry and Martha both confront Alan and ask him what happened to drive him down this path. At first he refuse to acknowledge them, but after seeing their persistence, he tells them what happened the day his girlfriend died. He reveals that he was the only one who could have stopped a fusion bomb, or at least trapped it with his powers, but something stopped him, causing her to hit a short range detonator. He was able to protect everyone else, but she was too close to the bomb. Because of that event, he turned the limiters in his gauntlets into inhibitors, and worked to create a new identity for himself, the only thing allowing him to retain his sanity being a piece of the bombs shell which he had salvaged, the Lexcorp logo seemingly bolted to it. The rest they can ask Dick and Damian for.
While Terry goes back to training as usual, Martha can't get his words out of her head, so she decides to learn more about him. She discovers that his father founded a company that was later bought by Wayne Enterprises after his father was murdered. His mother later died of cancer and Dick took his sister in and gave her a room at Wayne Manor while Alan moved in to the base set up for Omega Squad. She also learns that Alan's unrestricted power could either give life to a dying world or completely eradicate the most advanced of civilizations in a heartbeat.
Martha goes to visit Alan's sister, Penelope and asks if she knows that Alan is in the Batcave. After the two talk about their inability to connect with their respective brothers, they become fast friends, meeting everyday so Martha can tell her what she managed to get out of Alan the previous night. Though he wouldn't openly say it, Martha's night;y visits warms Alan up to her, so that when Dick decides to risk allowing Alan to join Damian and Martha on patrol, he holds back on actually killing the criminals and even saves her a few times, though he does everything he can to make those incidents look like nothing more than coincidences.
That's about as far as I'm going to go with describing this arc, as I don't want to spoil the ending.
...
Arc 2: Justice League Beyond
This Arc begins one year after Terry becomes Batman Beyond(six years after the end of the first chapter). At this point, Terry has inspired a new breed of heroes; the Beyonds: heroes who share a name with already existing, still living heroes. Terry himself has worked with three in his first year as a Bat: Green Lantern Beyond; who has somehow absorbed a lantern into his body, making it so that he doesn't need a power ring, Booster Gold Beyond; who single-handedly developed a suit that allows her to use less powerful, yet more focused version of Booster Golds abilities, and Supergirl Beyond; a girl from another Earth that was encased in a Kryptonite meteor for an unknown amount of time, causing her to come out with Kryptonian abilities, with an added immunity to Kryptonite.
As for the other Bats, they're pretty much the same, except for Damian and Martha. After Alan, a pivotal character in the previous arc mentioned, dies three years prior to this arc, Martha returns to Themyscira and Damian takes up the mantle of Death Bat to honor Alan's memory. As for a new Robin, well, remember Wesley from Arc 1? Well he and Kara have two daughters: Natalie and Monica. Natalie became Supergirl shortly after Luthor's death in Arc 1, and Monica became Robin after Dick and Damian agreed that she was the best choice. So basically, the granddaughter of an alternate Earth Joker is this Earth's sixth Robin.
When Parademons attack all over the globe, Terry and Supergirl Beyond are sent as a relief group to escort the people of Berlin to safety, but when the Parademons retreat from Berlin and Darkseid himself arrives, the two take cover and call for backup. Backup arrives in the form of Green Lantern Beyond and Booster Gold Beyond, as well as newcomers Flash Beyond and Killer Frost Beyond(or simply Frost as she prefers). They manage to dodge Darkseid's assault as he pushes them closer and closer to a hudden military facility that Terry figures is holding something Darkseid is after.
Meanwhile on Themyscira, Diana, now fully committed to being the Queen of the Amazons decides that the world now needs two Wonder Women to protect it. She sends Donna Troy to take her place on the League just as Dick replaced Bruce, While Martha would be sent to aid the Beyonds as Wonder Woman Beyond.
Martha arrives on the scene just in time to keep Terry from being incinerated by Darkseid's Omega Beams, openingly referring to him as her little brother. Now united, the seven Beyonds hold Darkseid off long enough for Superman to errive. He decides that it might be a good idea for them to stick together and Terry brings them to a private house he anonimously purchased to get away from the drama of Wayne Manor. He informs the others that he's been working on his own personal Batcave beneath the house and that it can be easily converted into the base for their new team, their Justice League Beyond.
And the story would continue on from here.
...
So, what do you think? Which arc should I go with if I do continue the story? Should I go for the darker, world building Death Bat arc, or jump straight to Terry as Batman Beyond in the Justice League Beyond arc?