Depending on who comes out on top... My answer varies. So I'm guessing this is an EXO fic, correct? So I am assuming EXO wins.

B.A.P vs EXO = Aliens vs Aliens. This is really common, but doesn't make for a bad story. It only provokes rookie-wars.

SuJu vs EXO = y Ajusshis vs Cute Rookies. I see them as allies, more than anything else. As my bias group, I can honestly say SJ really isn't the gang type, they're more like rouges, or in Siwon and Heechul's case, a priest and a princess.

However, I can also see Super Junior and BIGBANG as comic relief.

I know SHINee isn't one of the options, but I've always imagined the two having a rivalry. Although... 2NE1 as rivals would make for an incredibly unique story. I haven't seen it been done before.

@wowwfantasticbabyy: Yes!! That's what I thought as well!! ^^'

I agree with wowwfantasticbabyy :)

I think that because you're probably using all 12 members of EXO, it would be pretty even if Super Junior was their enemy... Although they're from the same company. :)

It would be cool to have something other than B.A.P. It's way too common these days.

I've voted for BIGBANG but a girlgroup (2NE1) would be something new..something different...something better :)
And B.A.P being EXO's rivals is so mainstream :ss

BAP is always ending up as EXO's enemies, I think either Big Bang or 2NE1 should be it. It would be different and it sounds unique.

2ne1 sounds interesting too though i voted for BAP