What will Halo 4 be about?

Halo 4 is going to obviously take place after halo 3. it will take place probably on a forerunner installation besides a halo or a forerunner planet. who the enemy is is unclear but i expect forerunners to be directly involved and flood.

Since the Covenant were defeated and the Flood were perhaps annihilated, I'm guessing Master Chief will just be dealing with more Forerunner Sentinels and maybe a new threat. What Halo 4 will hold is still unclear.

Franky stated that it will be essentially about the return of masterchief.

Halo 4 is going to take up where the Halo 3 legendary ending left off. In the teaser trailer it shows the Chief facing off against a forerunner shield world, or something like that, but it will definitely be mostly about the forerunners.

it's obviously going to be about raping face X3

It willl be about teh master chief trying to find his people agian and the arbitar lokking for him too with any one he can get

Definitively looks like forerunners

Halo 4 is about the return of the Master Chief. As seen in the Legendary ending for Halo 3, the derelict ship Chief is stranded on approaches as Forerunner shield world. Chief will face Covenant, Forerunner defense systems, the Didact (who is a very prominent Forerunner along with the Librarian) and possibly deal with the Precursors. The UNSC Infinity which is the newest (and largest) UNSC ship ever built crashes on the aforementioned shield world with Chief on it, carrying a buttload of new Spartan IV soldiers. Can't wait!