‘Antony’ tells us he got to chat with X-Men: The Last Stand visual effects supervisor John Bruno about both Magneto and Fantastic Four 2:
I didn’t know if you were interested but I can confirm that Ian McKellen will be playing Magneto in the prequel. I was told this by John Bruno at a screening of X3. The company who worked on X3 to deage them is also going to be doing the Mags prequel. According to John, Ian is really excited.
I was lucky enough to spend nearly 2 hrs alone with him asking all sorts of stuff… by the way Silver Surfer is also in FF2.
Stay tuned for more on these projects as the news comes in.
Source: Antony