Just dug this beautiful thing out of the upcoming PTR patch. I think it's already my favourite pet!
Type: Flying
Health: 1420 - Power: 337 - Speed: 244
slot 1:
Peck / Shadow Slash
slot 2:
Call Darkness / Consume Corpse
slot 3:
Nocturnal Strike / Anzu's Blessing
(Anzu's Blessing is a team-wide damage buff)
Now confirmed to be the Collector's Edition pet!