It's very interesting. I played that new-ish Marvel: Cosmic Invasion game and recently played Fight 'N Rage. I believe both are built in the exact same game engine. Fight 'N Rage, which is undoubtedly the better of the two games (although both are quite fun) had a tiny roster. I think there was a single primary developer, and then one guy did the music and maybe 1-2 other people helped with things. The Marvel game was made by a "real" studio and had tens (hundreds?) of staff to build what was effectively a slightly lower quality game. (although the Marvel game had a much smaller staff than anything like a modern AAA release.) Famously, Doom and Quake were made by quite small teams.

I don't know what the answer is, but there just seems to be unavoidable bloat all around. Staff, cost, complexity, system requirements, etc.