Jacob To Release The Beast In X-Men Prequel?

So Benjamin Walker, who had officially signed on to play the younger Beast in the upcoming, "X-Men: First Class" has been dropped by the studio. No one knows why he's been dropped, but I'm sure we'll find out in the next week or two.
Now the Fox are eying up some new actors to take on the role. They mainly have their eyes on Twilight's Taylor Lautner. I think he may be a bit too young as Walker was 26 and Lautner is only 18. But I guess the makers of the new film can make him look a lot older than what he really is.