It’s not a “new” idea. People have been asking about this since release. If you don’t believe me check the previous forum threads.
It likely won’t happen. Blizzard is a new company, under corporate management from Activision. Big corporations don’t like giving anyone autonomy.
If you’re hoping he’s going to come back with carte blanche, you’re really barking up the wrong tree.
Also didn’t Phil Shenk do animations and also write a lot of the lore for the game? That sounds like a guy a part of a real project. Not some dude hired on the Diablo 3 team and told “animate this monster, your paydays on Friday”.
They seem weird and standoffish about acknowledging Brevik’s existence. MrLlamaSC asked if they were consulting with him during the original dev roundtable at BlizzCon when D2R was announced, and they gave some weird and mysterious “no comment” answer. And then Brevik quickly thereafter tweeted that he isn’t working with them. I don’t know why “no” was such a difficult answer for the D2R team.
Diablo 1, yeah. It was based on Rogue, so it was originally turn-based and permadeath. He was talked into making it real-time and not permadeath. And then Hardcore was added in Diablo 2.
To be fair, real-time permadeath is a lot harder than turn-based permadeath. With a turn-based game you have all the time in the world to plan your moves and react to situations. Just another reason why the Hardcore players are a bit crazy.
Mr. Brevik is not likely to help Blizz due to the scandal Blizz is going through. Now if things do change where Blizz becomes more like the Blizz of old, pre Activision then he might help them.
one can only hope but if we work together 
david doesnt want anything to do with blizzard anymore.
i get that everyone has a price but this one will be steep.