Think of this as in Back to The Future Part II. Yeah saying time travel is not created yet, it still isn't today in real life, so I have the liberty to use it now.
All Four
Korra was the first to get up and tripped over everyone back onto the floor. "Gu… gu…guys…there…is.a…a…drag…dragon" Korra said with fright. There was a monstrous dragon leaning over the four except one of the four was not scared. "Fang" Julie said jumping up and giving her loveable dragon a hug. "Fang" Korra said. The next second Korra, Jake and Aang were flying through the air. Aang VI, Bart and Katie had all appeared. "Get off our friend" blind Bart said angrily. "Guys stop" Julie said "These three are other Avatars, my past lives". Bart gave off another shove to show Jake who is boss then walked away. Jake got back up and glared after Bart "I wouldn't if I were you that is one of Tophs ancestors" Julie said.
"Meaning" Jake said not caring. "He can feel the earth around him just by standing on it" Julie said. "Oh" Jake said stopping his act of rage. There was a huge explosion just behind them. "What the" Korra said "What is going on". "When I time traveled, I was on a recon mission and this is why" Julie said as there were explosions coming closer. "We have to run" Jake said running away from the explosions, Julie grabbed his hand. "Are you crazy, they are trying to flush us out we need to wait for the right moment to run towards the explosions" Julie said. "Towards, you mean away right" Korra said. "No I mean towards" Julie said again as the explosions got closer. Julie got onto Fangs back as did everyone else. "Not so many people" Julie said. "What should we do then" Jake said clearly scared he was way out of his element.
"You can ride Mo-Mo" Julie said. "Mo-Mo is a lemur" Aang said confused as a bison landed next to him. Aang got on "yip yip" he said as the bison left the ground Jake and Korra got on.
"So what did you do before the war" Jake asked Bart who was on the dragon. "I was in a pro- bending team" Bart said. "Me too" Katie said. "Hmm" Julie said. "Don't hmm us you were in our team" Katie said. "Wait what" Korra said sitting up "but you said you didn't know how to play". "Let me guess she lost miserably then the next second you were getting creamed" Bart said with a smirk. "Yeah" Korra said thinking "Hey you tricked us". "Haha instead of complaining how about you practice meditating" Julie said.
"Good idea" Aang VI said "Let's go". Korra started relaxing as did the others and three of them went into the spirit world. "I didn't think you could ever get here" Julie said as Roku's dragon came to get them. Only two of the four were there to greet them Roku and Kioshi. "So you wish to know why this is happening" Roku said. "No we wanted to come here for a tea party" Julie said. Kioshi laughed "Now young avatars you will see your purpose when the time of your life connects" she said. "Speak english" Jake said in anger. "The comet is almost here yes" Roku said. "Sozins comet, yep it will be here in two days" Julie said. "You must beat your father, and other branches of the bending nation before it comes" Kioshi said. "Yeah…hmm…ha…are you insane" Julie yelled. "No, but everything will be revealed" Kioshi said.
The tree came back into the real world, Julie was filled with dread. "So what happend" Bart said. "We have to teach Korra how to enter into the spirit world and beat my father" Julie said. "And the other four nations" Jake said. "In two days" Aang finished. "Then we better get started" Katie said. "I am ready" Bart said. "No not you guys, us four" Julie said. Julies friends looked at each other "Fine, but we will be there just in case" Bart said. Julie nodded in agreement. The group landed in the very familiar square, "Hey it is Ba-Sing-Se" Aang said. "No it is a look alike of that" Katie said smiling "It also copies Republic City". The avatars sneak into the castle "I never thought I would be here again" Julie sighed. Julie leads them towards her father's room.
"Sis" Lester said behind them. Korra and Jake were prepared to harm him "wait that is just my idiot brother" Julie said. "Don't kill dad" Lester said "Please don't". "No I am just going to bruise him alittle" Julie said. Lester walked away happy with the answer. The foursome went into the room and was instantly fighting Julies father.
The fight was over and the King had lost miserably, now her father had to stay out of the war. They got on their rides and went to the King of the Earth nation and beat him too. Meanwhile both Aangs were trying to teach Korra how to meditate, but they had a very bad student. The landed in the Water Nation and beat the Monarchy. Then they beat the President (Congress/Senate/ect…) of the Air Nation, so they won. Except Korra still had to learn how to meditate.
"No pressure, but you need to learn how to meditate in five hours" Jake said. "Oh gee thanks Jake" Korra replies. "No problem" Jake said. The group was thinking about the awesome wins that they had. Korra even managed to concentrate on her meditation until, she entered the spirit world. Just shy of ten minutes before go time. "Let's go to the spirit world too" Jake said. The four rode Rokus dragon to the four benders except. "Where are they" Jake said angrily. "Are we too late" Korra said annoyed. "Welcome" a voice said "We are the four avatars before you who had this amazing phenomenon happen to us". "Yes, we were just as confused as you" another voice said.
"But here is why you are here" another voice said "Every one thousand years there is rare alignment that will boost an avatar". "The bad news is that if there is only one avatar then that avatar will end up being stripped of their bending" a final voice said "and then they have to wait a few years to train the next avatar". "But how can they train them if their powers are gone" Jake asked confused. "Train them mentally" the first voice said "in the next few minutes you four will be thrown into your own time and then your times will combine". "During this time the four of you, will have full access to your bending skills" the second voice added. "But I can't air bend" Korra said. "Or fire bend or air bend" Jake said pointing to himself. "You will" the final voice said. "Now go" the third voice said. "Beat your enemies and save the world together" the four voices said at the same time.
The four avatars stopped meditating and stood up confused "What just happened" Jake asked. No one was able to answer as Jake, Aang and Korra were all sucked back into their own times.