They were featured a bit in Renew Your Vows. And that's pretty much the most 'recent' I've seen them. Didn't they continue to age more or less in 'real-time', until they somehow out-aged Franklin lol?
But yeah, I would love to even just see a miniseries that revisits them now that they're older. Kinda like a 'where are they now' kind of series, if they don't want to make them a full-time superhero team.
You know what I'm really surprised about? Marvel not making a live-action Power Pack. Think about it, it's tailor-made for tweens, which is a demographic their current movies don't fully hit. It has space pony-people and space lizard-people. It is a merchandising goldmine.