I have been wondering this but I can’t seem to find any information on it. Could anyone possible shed some light on this topic? Forge is one of my all time favorite things to do in Halo, and Halo is my all time favorite game. So you can guess why I’d want to know, haha.
Yes, it will, but they aren’t ready to speak about its features yet.
http://halocouncil.com/content.php?r=449-The-Halo-Bulletin-6.13.12
This is Frank O’connor answering this link to more questions with him above ^
Will Halo 4’s Forge have themed forge maps with a greater forge palette as to prevent the problem that Halo: Reach had with all of its maps looking like gray Forerunner buildings? –Majatek
Halo 4 Forge, like all aspects of the game, will have significant improvements, changes and/or overhauls. We will be talking about those later this summer. I will, however, ask people to retain some semblance of dignity when imagining infinite tools that allow them to build a universe from scratch. To be clear, this will be a significant improvement in functionality and results, but it will continue the tradition of Forge’s ease of use, scale and scope. But I also won’t be a buzzkill.
Yes there is going to be forge in Halo 4, who knows, we might be lucky and see it at Comic-con next month 
> Yes, it will, but they aren’t ready to speak about its features yet.
^This. Also it seems that there will be more options concerning how the pieces will look, so that the maps won’t all look similar to forerunner structures (like REACH).