It's about Marvel Tokon: Fighting Souls. The leak was caused by Steam, where an updated game page with a lot of details briefly appeared before the data was deleted.
From the premature update, it follows that Marvel Tokon: Fighting Souls will be a 4v4 fighting game with tag-team mechanics (the player switches characters in battle). The game will offer both local and online battles. Users will be able to play on the same screen, as well as connect to network lobbies. Separately, support for rooms of up to 64 players is mentioned, which indicates a clear calculation for the tournament format.
The leak also talks about full single-player content. The description mentions a separate Episode Mode for one player, focused on team dynamics and lore. The project will not be limited to the e-sports arena and ranked battles, but will offer story content.
Technical details of the PC version have also been revealed. Ultra settings, a 60 FPS limit, and 4K support on compatible screens are specified. DualSense support on PC with full functionality via wired connection has been confirmed.
At the start, 20 playable Marvel characters are announced. Teams will consist of four heroes or villains, and the selection of the roster will unlock new combos, synergies, and tactical possibilities. The arenas are based on iconic locations in the Marvel universe, some of which will offer dynamic environments and interactive transitions between zones.
The combat system is described as accessible but deep. Support for different control schemes is declared — from classic to simplified, with simple combos for beginners and the possibility of mastering advanced mechanics.