Yeah, I also think Hope is in Immortal. She was part of the Council in one of the Destiny of X teasers and Gillen loves her. Plus it wouldn't make sense to remove her from the Five so she can be a supporting character in X-men Red.
Red will feature Storm, Cable, Iceman and probably Cannonball, Khora, Manifold and others from S.W.O.R.D.