They don't plan to reboot with COIE. Too much world building in the next wave of movies to reboot.
The post credit scene set up the next Flash's adventure/mission
spoilers:
Batfleck task him to "Find us" |
end of spoilers. It's something Ezra* and the Flash team come up with. Can't think of it as JL related because of it, but it could be retrofit there, of course.
It's some Flash's multiverse trip to find Batfleck, but if Barry fucked up the timeline to save his mom, he could cause a multiverse crisis to save his bff.
*It's not known yet, I think, but Ezra had a lot of creative control over the movie, they came up with some concepts, and rewrite the script. If you'll see them getting executive prod. or writing/story credits, here's why.