Regarding the source, Plastichead is the official distributor of Burzum, so it's pretty much sure that this isn't fake.
Regarding the news itself, I think this is a positive sign. Firstly, the fact that Vikernes has been able to pull this off so quickly means that he at least isn't running out of ideas (contra, for instance, Fenriz). Secondly, the artwork and the song titles seem suggest that he's thinking like a real artist again instead of trying to create a success formula of "Pagan Metal" (Belus).