The point that gets lost in this whole thing is that by all indications, Singer is NOT writing it - his 2 screenwriters are and he is overseeing it and providing a general plot to work off of, which as he said will be tied in with the movie somehow.
icemastertron, I can see your point of not dissing something without knowing what will happen, but here's my problem with the whole thing. First, in my opinion, Ultimate X-Men is the worst Ultimate book out there. The books is almost like an afterthought, with no dedicated writer to hold down the fort and give the book some TLC. Vaughan comes in and shows that he can give the book some real support and write some good stories, and he gets yanked? For what? A movie tie in? Why not throw Singer (and his ghost writers) on the X-Men book that Chuck Austen just left?
I also have a huge problem with this guy's ego. When this was first announced it was revealed that the book title was changing to "Bryan Singer Presents...Ultimate X-Men." I have a serious problem with that kind of ego, and if it was Marvel's idea I have a problem with the notion that he is more important than any other comic writer that he would have his name in the title. Bad, bad idea.
Why screw up a book that has potential to be as great as any of the other Ultimate books when there are plenty of bad X-titles that he could screw up? There is no benefit whatsoever to a movie tie-in for Ultimate X-Men, and as several people have said in here they are so different (the movies and the Ultimate book) that it can only hurt the book.