Actually, the most recent is not him at 15.
He's still an adult in his mid 20s... He just always lived with Aunt May and he never married Mary Jane.
Basically, during the Marvel "Civil War", he was with Tony Stark and the government, then in the middle... he flipped. Everyone knew who he was and the Kingpin put a hit out on MJ... but Aunt May got caught in the cross fire.
He said he's do anything to have one more day with Aunt may and some ethereal creature (I think it was Madam Web or some crap) gave him Aunt may back, but losing MJ and the last 20 (Our time) years.
That's where we are now.
Yes, it sucks and was one of the dumbest things Marvel has done ever... Killing Captain America is number 1 on my list right now.