User blog comment:ChromastoneandTabby/Ultimate Crossover Project: BTFF RPG/@comment-4588264-20151128174055/@comment-1824169-20151128175251

I figured the lineup might be something like this:

Playable Characters:

10 Users

10 Aliens

Stages:

10 Series

1 Hub

1 Final Dungeon

Bosses:

10 Main Villains of various series

1 Final Boss

1 Secret Boss