Here's the other idea.
Crossover with Firefly
-John and River in this are friends, they went to school together. (The one Simon broke River out of) They were friends before that.
-You decide if the Connor's (Sarah, John, Derek, and Cameron) time traveled to the future. If it was an accident and whatever, doesn't matter to me how you make it work.
-Like Simon with River, someone or everyone from John's family broke him out, but after River did.
-River is always talking about John Connor and stuff, both lucidly and non. Simon kinda sorta knows who John is, he just doesn't know that John and River were in school together.
-Eventaully the Connors and the Serenity crew run into each other start traveling together.
-How does John's destiny fit into all this? Idk, you tell me. Lol.
-How does everyone react and what not to not 1 but 2 insane kids running around on the ship, and the whole Cameron/River look-alike thing?