Thread:SecondOpinion/@comment-5758863-20150401180625/@comment-5688420-20150415012349

Arcade Mode is 10 stages long. Stage 9 is the sub-boss fight, which depent on your first character's source series (for example if your chosen team is Keith/Vanessa, then Savio will be the sub-boss, secondary characers such as Kenichi and Death Slayer will automatically fight their side's big bad as the sub-boss (Aris for Orange Soft, Shiroan for GameCom, Einsteintin for In-Verse), the final stage 10 is the one with Kaos.

you also get to choose your next opponent for the first 8 stages, just like in SFIII: Third Strike and KOF 2002.