Soundwave on 28 April 2016
To be honest though the driver of superhero films today is largely people who grew up in the 80s/90s ... Batman was cool ... but Superman was ... not cool.
The Infinity Gauntlet and X-Men and Spider-Man (McFarlane-era) were all "cool", moreso than Superman ... so no it doesn't entirely stun me characters like the Avengers, Captain America, etc. are very popular.
I grew up collecting Marvel cards and comics, so did basically every kid I knew, now we're all in our 20s/30s. We know all these characters.
It's really just "Marvel" ... that's the brand it's not a specific Iron Man or Captain America movie, Disney is smart enough to basically make all these movies "Marvel universe" movies.
