If they go the USMC route, transition bubbas will come from existing helo pilots, and tiltrotor will be a selection option out of primary. Tilt studs will go to HTs for an abbreviated syllabus that includes fams and... BIs? ...then get their wings from VT-31/35.
(I can't see why they wouldn't go the USMC route.)
(I can't see why they wouldn't go the USMC route.)