Blut Aus Nord are racist?
I think the next wave of metal should combine relatively modern elements with aspects of metal which were stripped away when the genre progressed into black/death. Specifically, I'd like to see highly melodious, harmonic and tasteful virtuosity of bands such as Iron Maiden, Judas Priest and various speed metal bands to make a return in the context of death/black metal (Arghoslent and perhaps Windham Hell are probably the only bands doing anything close to this right now). I'd also like to see metal begin to move away from the riff-oriented composition style to an extent, towards a more classical method of structure. In this regard, I'd like to see influence taken from later Gorguts, which switches up its riffs with a great deal of variation, to avoid the repetitiveness which some find in the "repeat riff x y times, next riff" theory which most metal operates under.
It's possible that any such style would sound absolutely terrible, but these are just some ideas