Probably. Marvel got a little heady in the 70s when the horror restrictions were lifted. They pushed a few boundaries on other content too. Guys like Englehart, Gerber, Claremont and a few others tacking topics that in the past or future wouldn't be touched. (In the Mighty Marvel Manner of course) The decade that followed seemed a little conservative at times.Probably for the same reason Thor doesn't throw down with Jehovah. It's a little touchy.