Halo 4 which is coming out next year will probably have a ton of great futures to offer. What do you think will be in Halo 4 forge that will be different than previous games. A new forge world perhaps?
It's a bit asinine to be predicting what halo 4 will allow us to do in forge, if it even has forge, though logically it would have some form of map editor, I suppose.
Not your fault, but there's already a thread about this. About ten thousand threads, to be more precise. They're all probably buried back in the 100's of pages in this forum though, so you're forgiven if you couldn't find one in the first few pages. Don't be surprised if this thread gets locked, however.