That's a good point, but I think that it may work favorably during transitional periods. When it comes time for the cast and crew of the Iron Man franchise to hang it up, start bringing out characters like Black Panther, Dr. Strange, The Punisher, etc.
As for the more obscure titles from the medium, I think that depending upon their subject matter, they can occupy their own niche without being associated with superheroes. Most people I know never had a clue that films like Road to Perdition, A History of Violence, and the Losers were based on comics.