APEX is known for it's Smash/Brawl scene but Injustice had some pretty heated competition and an eclectic Top 8 representation. I'm not sure if anyone still follows Injustice here but the game has changed pretty significantly since the "big patch".

Top 8 Injustice at APEX 2014
Characters used in Top 8:
Batgirl Superman Batman Lex Luthor Martian Manhunter Aquaman Doomsday Black Adam Wonder Woman