SplaDoom

aka what the hell kind of drugs did I take to come up with this.

This'd be a merge of Splatoon's characters, weapons, and ink-based gimmicks and a bit of Doom's own gameplay style and modes. The Doomguys are made into Inklings (of both genders) and the monsters are Octarians.

There'd be lods of Deathmatch, LMS, free-for-all Turf Wars, Turf Wars with no limit to the number of players on a team, and alongside all that, this would be made compatible with numerous third-party mods such as Idiotic LMS, Who Dun It, and Shotgun Frenzy.

A man can dream.