I'm ready! My understanding is that Orson Scott Card insisted on staying pretty involved in this, so I have high hopes.
I just read the wiki page
and one big difference between the movie and the book is that the audience is going to know what's really going on from the beginning instead of finding out at the end when Ender finds out. For those of us who have read the book, that's probably a good thing since we already know it anyway.
“[Cruz] might not be the most fun to have a drink at the bar with, but America needs a designated driver.” - Mica Mosbacher, wife of the late Robert Mosbacher, Secretary of Commerce