I don't think there will be a couple in this movie. Maybe Hank/Raven but they already covered that in FC. If the X-men ally with the Brotherhood again, then there might be something there. Plus those actors are a true couple in life, or at least have been in the past, so pretty easy to play off of that and intimate that if they choose not to show so explicitly. This film needs to be all about moving a story forward as opposed to going off in tangents regarding invidual character development. That's not to say it shouldn't be there. We need to see that maturation from Charles and Eric. Outside of that, the audiences pretty much know who these people are. They just want a solid story that can move the franchise out from this rut.