I can second that an Ender's Game movie is in the works already, and on its way. Its still unknown as to when it will be finished and released, probably a long time.
I think that making a newer version of the Chronicles of Narnia would be a brilliant idea.
With the special effects that we have these days, they could really make a good movie out of it. It would probably appeal mostly to younger audiences. But I read the books when I was younger, and loved them all. Maybe it would be like the Harry Potter books and movies, that even adults can enjoy.