Teams and casts for Blue and Gold have been revealed by IGN:
Gold
Team: Marc Guggenheim and Ardian Syaf
Cast: Storm, (team leader) Storm, Colossus, Nightcrawler, Old Man Logan, and Rachel Grey.
Blue
Team: Cullen Bunn
Cast: Jean Grey, (team leader) Cyclops, Iceman, Beast and Angel, mentored by Magneto.
So looks like Blue is going to be a straight O5 book, no Idie, Evan, or Wolverine.