In the Prologue your group was a team up of Dante (DMC), Demitri Maximoff (DarkStalkers), Arthur (Ghosts N' Goblins), and Valkyrie (From an old PC title never launched in the states) fighting against Lord Raptor (Again, Darkstalkers) and an army of Zombies and demons.
If you are not already pumped, you clearly have no soul.
Edit: Correction, I think Raptor was a different fight. And you were using Frank West, Zombie chick from Dark Stalkers, Jill Valentine and Christ Redfield from Resident evil, and smurfing Heihachi Mishima from Tekken.