Originally Posted by NanaT
I understand your point but following your logic there really isn't really any reason to justify the presence of any other returning cast members as they could just age mcavoy and fassbender with make-up as well as the rest of the first class cast. None of the original actors nor their characters are essential to DOFP.
Your idea of introducing young storm would work if this movie was set in the eighties, which is very unlikely. If storm is going to be in this movie it will most likely be an adult storm in the future and if it is then it makes the most sense for Halle Berry to be playing her.
I guess it just boils down to whether the script calls for scenes with Xavier, Erik, Storm, Logan, etc., from the X3 timeframe.
If it just has a scene with Xavier and Erik playing chest from "today", there's no reason to have Halle, Famke or the others cast at all. Which opens a clean door to the past for new actresses to be cast in their roles.
In other words, their paths do not necessarily have to cross or even meet at all.