This story is inspired by the Marvel Series What If… There will be many things that will interact with the main story line.
1: Dick's cousin John Grayson will be alive. He will not be a hero however.
2: Donna Troy and Kara Davers will join the team.
3: Nobody will break up in this story. I am a huge Chalant fan if you haven't noticed.
4: Tim and Jason will be adopted by Bruce a little while after Auld Acquaintance.
5: Dick will inform the original members of the team about Aqualad deep cover, along with the original members of the Justice League and the Batfamily.
6: Kate Kane will be in this story. She will be six years older than Dick.
7: Bruce will be more fatherly with Dick.
8: After the episode Misplace, Dick will tell Zatanna his identity.
9: Damian and Raven will be born around the time Dick is fifteen.
10: Dick and Babara's relationship will be brother and sister like.
11: Wally will be trapped in the speed force at the end of season 2, and will be back in a year.
12: Artemis and Wally will be pregnant at age nineteen.
13: Dick will take Artemis's place as an undercover agent, while Conner leads the team.
14: When Dick is twenty four the Court of the Owl will kidnap him and brainwash him.
15: At Zatanna's and Dick's wedding, war will appear that will cause Criss. And there will be seven paragons to save them. I got that from the Arrowverse.
16: Dick will make the league call Titans, but will pass it on to Beast Boy and Red Robin.
17: Everyone will have kids and join the heroic legacy.
18: The team will be made public.
19: Nightwing will lead the Justice League.
So that's about it. If I have any new ideas, I will tell you. If you have suggestions then leave a comment.