Basara vs Guilty Gear
Tekken vs. Virtua Fighter… gaaaaaawd they keep teasing us in interviews.
Marvel vs. DC
Shonen Jump vs. Nintendo (Super Smash styled game)
MvCvSvGG
Power Stone vs. Super Smash
I’m still want my CVS3
I want my Gato, New Face Team and their orochi versions, K’, Vanessa, Genei Hurricane Benimaru, Ikari Team, and Krizalid up in that bitch.
Also on the capcom side, make Yang a stand alone, get Ibuki, Strider, Sean (like 2nd impact), Makoto, Alex, BB Hood, Talbain, Megaman X and Zero (Megaman X version)
TMNT TF 2. Forget a remake for graphics whores, get some new fighters (Ninjara and Shredder suit Karai from 2k3 cartoon W00T!) and gameplay features in there.
Corner-Trap knows whats up.
Basara vs. Samurai Showdown might have better rivalries…
Date vs. Yoshitora (battle of the multi-swords)
Sasuke / Kasuga vs. Hanzo / Galford (NINJA MADNESS)
Nobunaga vs. Gaoh (evil conquerers)
Ranmaru vs. Mina (archers)
Mistuhide vs. Asura (goth madness)
Oichi vs. Shiki (female emo / goth madness)
Hideyoshi vs. Seiger (power grapplers)
Keiji vs. Haohmaru (fun loving swordmasters)
There’s probably more, but that’s what I have so far. But yeah…Basara vs. SS would actually be really cool.
Forget remakes in generals, last time I checked sequels are suppose to be superior to the originals in gaming.
Ninja Turtles v Battle Toads.
DBZ vs. Powerstone
Last Blade vs Ninja Masters vs Samurai Spirits
Guilty Gear vs Toh-Shin-Den
Final Fight vs Double Dragon vs Streets of Rage
Battletoads vs TMNT vs Biker Mice from Mars
DoaX vs Rumble Roses vs Sexy Beach lol 
VSxGG
Sega vs Namco
Would mainly just be Virtua Fighter vs Tekken but there would be a few random characters thrown in from other game. Would be nice for me to see Bark and Bean in another game.
Marvel vs Guilty Gear
Cause Bridget Assist is gay.
Hokuto no ken vs Power Stone
Cause this shit would be weirder than a giraffe fucking a baby manatee.
Sammy vs. Capcom…it coulda worked.
TMNT, Power Rangers, Battletoads and Double Dragon in a spectacular clusterfuck.
I don’t play GG or any of the Darkstalkers/Vampire games, but they look like they could have had a cool crossover.
Fighters Megamix 2, with modern graphics.
Super Shaq Fu 2 Turbo HD…
SRK vs HERV
I like the sound to that actually, I spent like 5 mins in this thread trying to think of cool combinations between Shaq Fu and The Fighters Megamix.
I Guess Fighting Vipers vs Bloody Roar would be awesome as well
Soul Calibur vs Star Gladiator
Word the fuck up! Simon vs. Raziel would be epic.