no one has actually heard that much about it.
tbh i dont have a lot of faith in Blizzard developing original IPs and imo it may well...not be great.
most of Blizzards stuff is derivative and sourced form other places. their entire development history owes a great deal to "borrowing" stuff from other games and IPs (most notably Dune II, Warhammer, Warhammer 40k and EQ) and polishing the shit out it.
polishing is what Blizzard does best.
being "original" ? . . . not so much.