That sounds plausible to keep the superhero genre weak. Perhaps Lee and Kirby would make something like the Fantastic Four, except they're an ordinary family, and silly stuff keeps happening to them. The Funny Four? However, the popularity of superheroes by 1960, to me, indicates that there was a demand for some sort of action titles with impossible themes, so I imagine that science fiction comics would be big, and before the 60s are over, would eclipse the humor titles. Most of these science fiction titles would surely include heroes in tight clothes, and some of them would have super powers, so the superhero genre wouldn't die. Also, I think the 80s and 90s would be about a lot of muscular heroes with guns. To keep humor comics the dominant genre in comics for the majority of the time for 50 years could be difficult.
By the way, Neamathla, do you have any plans for Five Colors for a Dime?