I think the reason they bypassed the Phoenix Saga is the whole Shi'ar/M'kraan thing on the big screen it would be too Star Warsy and corney. I can't wait to see Dark Phoenix I've always said she could do way more damage and be even more a threat if she was contained to Earth. Just imagine her rampaging across the globe burning major cities to ash and blowing away anyone who ties to stop her...... oh I get all tingley just thinking about it.
I'am fire made flesh power incarnate I'am DARK PHOENIX!