User blog comment:Tnt ntc/10 Things I Want From each show/@comment-27700324-20170928225254

Finally someone gets that Mon-El needs to have less attention. (Though personally he should die) And that Jesse needs more.

The crossover won't involve J'onn that much, but he is in it. The focus on the Supergirl part is the Danvers sisters interacting with the other characters. That was already confirmed.