SNK vs. Arc Systems Work.
Yes.
Arc System Works vs. Anything as long as Arc makes it.
Samurai Showdown vs Ronin Warriors (2d) or Soul Calibur (3d)
KI vs MK or SF… but not MK vs SF
Disney vs WB: a second string slug fest (ie Duck Tales, Dark Wing, Tale Spin, Goof Troop, Rescue Rangers etc… no mickey mouse vs Tiny Toons, Tazmania, The Warners, Pink & Brain, Good Feathers etc… no bugs bunny)
Shonen Showdown (mod of CvS2 ratio system with MvC2 and XvSF tag properties) earlier series of…
DB (pre-DBZ), Naruto (pre-Shippuden ), Bleach, FMA, YYH, One Piece, Yugioh (card summons captain commando style), Inuyasha, Ranma1/2, and Rurouni Kenshin as potentially a trilogy series.
Dark Stalkers vs Rival Schools: haunted campus (add a SF Dan and Blanka parody of shaggy and scooby doo)
That damn cross-over that was supposed to happen between Arc Systems and Capcom
Yeah, I totally wanna see Goh land a perfect Yoko Otoshi on…like…a panda.
Fatal Fury vs Final Fight.
Kinda an offbeat one, but I think it would work well.
sagat vs balrog.
oh wait…