Popkulture is onto something.
10 years from now, the influence and reverberation of all these movies will coalesce perfectly with the hunt for "first appearance" keys that is preferred among younger collectors. This will create a perfect storm for such books, whether or not superhero movies are still bring cranked out then as they are now:l, so I am doing a little rogue with my picks:
Tec 27- (He's Batman)
Action 1- (Superman is not what he used to be and will be even less so in ten years)
AF 15- (Spidey, already competing with the biggest and far scarcer GA keys will only continue to soar to the stratosphere as this will be the closest thing to "affordable" for the guys chasing the biggest guns)
Captain America Comics 1- (The multiple, true first appearances and iconic cover will always keep it in the top 5)
Incredible Hulk 181- (Although the most common by far, its overall and absolute demand will continue to push its value in every single grade to shocking levels that requires its placement on a list like this)
Marvel comics 1 has already gone the way of Tec 1, and that trend will only escalate as the older guard ages out. Cap 1 has already passed Bats 1 by some metrics. Superman 1, being essentially a book of reprints will lose it's lustre amongst the next, affluent generation as well but will always be a hard #6 or #7 (interchangeable with Bats 1).
-J.