I don't think Singer is planning an exact verbatim adaptation of the original comic by any means (how could he possibly fit it in with the cinematic X-verse).
But given how little we know about the movie at this stage, I think it's interesting
to compare how the movie may or may not differ from the comic. One way we can do that is to compare how, if at all, the roles of characters from the comicverse may vary from that in the film version. I think for the most part people are just musing out loud about what direction Singer may take. I don't think anyone is saying that the film version has to
conform with that of the comics, in terms of who's in it or anything else.