Do you think they will make a Halo movie.?

May be...

They stopped the production a while ago cause apparently they "ran out of budget" (sure they don't have any money after the release of Halo 3 ¬_¬), they're still having a big discussion about it though, only time will tell.

There is already one in the works!...they're just looking for proper backing and funding from what I can find

no-one cares, the games are old news they didnt get any better just the same thing over and over, and games movies in general turn out to be rubbish