Zak Penn Writing X-men3?

We know that Bryan Singer is NO LONGER on board but apparently Zak Penn is going to pen the movie. When asked by Sci-Fi wire about writing on x-Men he said it is impossible to include everyone in the story. Probly a reference to Halle Berry getting upset over her role as storm. Can you include everyone Sci-fi Wire asked:

 "The answer is that you can't, and you have to make really difficult choices. That's actually the most difficult thing about writing an X-Men movie. I think on X-Men 2, I counted 14 main characters, and I haven't even begun to count how many there are now.

 It's actually very difficult. It might not seem it, but it's a very difficult writing assignment in a lot of ways, because it's so complicated juggling all these different storylines. The movie is still coming together, but I believe that all the major players are back."

When asked about the new director and Bryan Singer leaving Zak Penn Said:

We don't know who the director is yet, which is fantastic," Penn joked. "I love our director right now. He's no one. Here's the thing. I actually got along pretty well with Bryan. He's got very strong opinions, but fundamentally, because he did such a good job on the movies, it was hard not to. ...

There are people involved, I guess, who didn't get along with Bryan, but he clearly did an excellent job with the first two films. So it's going to be difficult to follow in his footsteps. That said, there's no question that because he's got strong opinions it's a little bit easier for me as a writer, because ... whatever ... it's one less argument you need to have.

You can read more of the interview by heading here