Originally Posted by Electrix
If Storm was in the script when Vaughn was still attached Bryan would have had to 'deal with' Halle anyway because he's producing. He would have been on-set and providing input on the story/characters. Whether Bryan was directing or producing Halle and himself would have been 'dealing' with each other either way, so it's unlikely he cut Storm as soon as he took over just because he had a thing with Halle 10 years ago. Lauren Shuler Donner and Halle get on fine, so Bryan would have to convince the fellow producers and the studio to get rid of one of the most familiar faces from the X-trilogy.
Storm has either been involved in the story from the beginning, or she hasn't. We'll find out which it is soon.
Storm's part in the previous films have been so inconsequential that she could probably be written out while shooting if a director wanted. Her few lines could just be reassigned to someone else as they rarely ever have anything to do with her character or have any importance to the plot. I can't imagine her role would be any different in DOFP.
Halle is also rumoured to have not got along with Famke (a tabloid even picked up the feud between the two when X3 was released). Not that that will be a big factor in anything, but it's another person part of the Singer crew that has had problems with Berry.