Hidden characters include a red venom (considered to be Carnage), a gold War Machine (called Iron Man), Lillith (the other woman that appears with Morrigan), and Roll, Mega Man's sister
Most of the sound effects in this game are recycled from another CP System-2, fighting game titled Street Fighter Zero (1995).
The first Street Fighter-related, arcade game with under 8 world warriors in it.
This video game takes place in the Earth-30847 of the Marvel Comics multiverse, together with The Punisher (1993), X-Men: Children of the Atom (1994), X-Men: Mutant Apocalypse (1994), Marvel Super Heroes (1995), Marvel Super Heroes in War of the Gems (1996), X-Men vs. Street Fighter (1996), Marvel Super Heroes vs. Street Fighter (1997), Marvel vs. Capcom 2: New Age of Heroes (2000), Marvel vs. Capcom 3: Fate of Two Worlds (2011), Ultimate Marvel vs. Capcom 3 (2011) and Marvel vs. Capcom: Infinite (2017).