Sure, but the Richards kids grew up in a way that still made it current time.  Since they basically got stuck traveling through alternate realities for what was years for them, but a week in 616 reality's time.  So I'll hesitantly say sure, I would say to keep that in mind.

I wouldn't mind J2 personally, but he'd need a new costume, the one from the MC2 universe reeked of 90's...