Are you retarded? Serious question by the way.
There is nothing here "confirmed", just a load of heresay, re-posting of things we already know and a "[343i] are working on something big halo related". Well no f**king -blam!-! That's what your meant to be doing, you know, as Microsoft's "Halo" studio.
We know there will be a Halo 4 at some point, and it will likely be annouced this year. However, what we have here is niether an annoucment nor confirmation of such.