It's a silly joke among some questers that the true forms of Mahjarrat are Cosmic Turkeys, since Children of Mah was released with the Thanksgiving Event in 2016
I do wish we had seen more of the TzHaar storyline, and really all the other storylines as well, before they started the Elder Gods one. There is so much potential elsewhere, and the Elder Gods lore becomes that much poorer for not having explored that potential beforehand.