Yes, the PS5 is backwards compatible with the PS4, allowing you to play almost any PS4 game you already own on the new console. This includes both physical and digital versions of the games. Some games will also offer the option to upgrade to a PS5-optimized version.
The Marvel vs. Capcom Fighting Collection: Arcade Classics includes a total of seven games. These games are The Punisher (1993), X-Men: Children of the Atom (1994), Marvel Super Heroes (1995), X-Men vs6. Street Fighter (1996), Marvel Super Heroes vs. Street Fighter (1997), Marvel vs. Capcom: Clash of the Super Heroes (1998), and Marvel vs. Capcom 2: New Age of Heroes (2000).
Yes, players can compete online in Marvel vs. Capcom Fighting Collection. The collection includes online ranked, casual, and lobby matches for all the fighting games, allowing players to showcase their abilities with friends, family, and other players from around the world24. The online play is supported with rollback netcode for a strong and stable experience4.