Wel I think James and Heather should be in semi retirement mainly just acting as consultants for the new team. Snowbird and Marrina should rejoin. Them with the new members is enough people for a team. Maybe Earthmover to. Of course the best thing would be if Uncanny Alpha Flight happened so all the characters could be used.
Puck would make a great trainer for new members. With his daughter there we don't really need two Pucks.