Mostly Capcom stuff; Alien vs. Predator, Jojo's, Street Fighter 3 New Generation, 2nd Impact, and 3rd Strike.
That rumored Raiden Fighters compilation would've been neat too. I loved Raiden Fighters Aces on my 360, but I would love it more on Saturn, lol.
You know I could have sworn I saw MvC1 Saturn announcement once.
Wonder how a Saturn SF3 would work. If I remember correctly even the Dreamcast version wasn't perfect.