I just knew the contrarians over at ANUS would have plenty of negative things to say about these samples. Since it's apparently not possible to link to ANUS over here, I'll just quote the blog posting in question.
Now that preorders are in and amazon.co.bbi has posted samples of Burzum's new work Belus, we can confidently reveal a verdict:
It does sound more like Venom. Dumbed down, that is. Too often vocals hit the same emphasis beats as the guitars and drums follow them around like a younger brother with Down's syndrome. Obvious riffs are obvious. Wish we could hear the songs develop, but from what's come out so far... maybe it's time to put our heads under the covers and remember old Burzum instead.
The shorter tracks sound like he's trying to do Filosofem as if crafted by a combination between Drudkh and later Destruction. This is very straightforward and without subtlety. Longer tracks sound like a re-interpretation in dumbed-down form of the older material. I never thought I'd see the day Burzum made a Cold Lake, but at least Cold Lake was good Megadeth-inspired heavy metal.
This is just dross.