Well, there is an Easter egg in TTK's story mission right before you face Oryx the first time, If you scan the statues in the doorway, the ghost stays that two of the three statues reference Oryx (Center), Crota (right). However when you scan the statue on the left the ghost says it appears to be another hive god however he has no data on it, not even from the World's Grave, however, he states only a name is present, Nochrus (or however you spell it).... Based on the arrangement of the statues this could hint that Crota has a brother, could possibly be a future DLC boss