Jemaine Atea Mahana Clement is a New Zealand actor, musician, comedian, screenwriter and director. With Bret McKenzie, as the comedy duo Flight of the Conchords, he has released several albums and created comedy series for both the BBC and HBO.
The film would be an adaption of the original Generation X comic and third generation of X-men. With the exception of slightly older, more-experianced leaders and some villians, the core group would be in their late teens/early twenties (or passable) out of highschool but younger than the former New Mutants/X-Force team in my adjacent casting.