Did a similar thread but it was...boring. So lets try it with Nintendo SSB characters!
What rivalries do you see the PSAS having with which SSB? And how do you see them going down, story/arcade-mode wise?
Sackboy rivalry with Kirby. Kirby mistakes Sackboy for a minion of the Evil Yin-Yarn.
Big Daddy rivalry with Jigglypuff. Big Daddy and Little Sister are approached by Jigglypuff. Little Sister recoils out of fear...she senses the true evil within Jigglypuff...who's just standing there with its happy grin. Big Daddy attacks the pink monster to defend Little Sister.