To piggy back on this, here’s some more specific examples (as far as I’m aware listed games have both Genesis and SNES versions unless otherwise noted; note that versions may differ in gameplay and/or quality):
- TMNT Turtles in Time (SNES)
- TMNT Hyperstone Heist (Genesis, IIRC same game different name)
- Captain America and the Avengers
- Spider-Man Maximum Carnage
- Batman Returns
- Adventures of Batman and Robin
- Spider-Man/X-Men Arcade’s Revenge
- X-Men 1 and 2 (Genesis only; for X-Men 1 you may need to work around resetting the console at one point in the game)
- there’s a Justice League fighting game, IIRC I think it’s called Justice League Task Force
- X-Men Mutant Apocalypse (SNES only)
The only time I was really caught off guard by a game like that was Darksiders II. I went into the final area expecting a gauntlet of challenges, beat the first big boss enemy in there… And final cutscene and credits. That guy was the final boss. Made me literally put down the controller and say “That was it?” I’ve always known long games were going to be long going in to them.