Tephra
11
No, although the Blowback encounter does seem to be enabled again in the beta.
However, those extra two were not entirely serious as Baboons do not currently exist as a pet (I made that Baboon pet icon myself). If Funcom added pet Baboons, and if they reopened transfers, then they might consider implementing the Siptah hearts.
Currently, if you do have a Blackened Heart or Molten Heart, they are completely ignored by Hanuman.