Terrible comparison.
Superman (aside from Batman) is hands down the most popular character DC owns. Ironman (and hell, let's be real, The Avengers as a whole) are at best B-C tier.
The fact that we're even comparing the two as equals is insane.
I don't think you dudes realize that. 20 years ago when I was reading comics if you would've told me an Ironman movie was going to do anywhere near a Superman or Batman movie, I would've laughed in your face.
Fred.
How about more girls knowing who Groot is over Wonder Woman, or there even being an Ant-Man film?