User blog comment:Bakublader1/The Team in Batman Beyond's Future./@comment-1038387-20130116233648

Well, here's a big fanfic hypothetical. Ah sure, why not.

The events of "Rebirth" happen in 2038 or 2039 (which are the only firm dates given). For the sake of easy calculating, I'll make it 2040.

The majority of the Team would be in their early to mid-forties. Miss Martian would be physically 26. Either they're in the League, or they've given that to the next generation already.