Cosplay is a factor, how many kids you see wearing Deadpool hoodies and tshirts, every teenage loves this character. Deadpool finally gets a movie years after being released, and let's face it in the first two years of the character was popular but took off to the stratosphere with his monthly series.
Gwen has cosplay appeal big time, Harley has cosplay appeal - woman are coming into the market more and more and you see 1st appearances of the character moving up do to demand. Just watching Comic Book Men, every 2nd episode a woman comes in to buy a popular first appearance of a character.
I don't have any investment in SG as I missed the boat big time on this, and everyday I regret it. I could probably suck it up to buy a few Edge 2 at around 100.00 bills however I have other key issues that being purchased at the time. I am envious anyone who got the jump on this, as Gwen will be here for a long time. Nothing would shock me if 616 Peter winds up with her somewhere down the road for nostalgia sakes.
Just my 2 cents.