Franklin and the FF appear in Power Pack: Into The Storm. I believe it's set about eight years ago, when Alex was 13 (he says he's that old in issue 1, and he should be about 21 now ignoring the Future Foundation's time away, as he was 19 before Secret Wars), Valeria wasn't yet born, and Franklin was Tattletale.
Also, a cliffhanger plot twist in Spider-Woman might explain how Franklin and Valeria now seem to be the same age.
spoilers:
Apparently Hydra have tech that can age up a toddler (Gerry Drew) to adulthood. Could Valeria have invented a similar device and aged herself up to match her brother? |
end of spoilers