To be able to just run Marvel Rivals on your PC, your system should have at least an Intel Core i5-6600K or AMD Ryzen 5 1600X processor, Windows 10 64-bit (1909 or newer) operating system, 16GB RAM, ...
Embark Studios says you only need an Intel Core i5-6600K or similar, combined with an Nvidia GeForce GTX 1050 Ti or similar to run the game, but that wouldn’t be the ideal experience.