Darkseid, one of the most popular DC Comics villains, is joining the ever-more-impressive roster of Injustice 2, after a notable and disappointing absence from the original.
Because he is such a significant character, it isn't unlikely that Darkseid will play a significant role in the story of Injustice 2, but so far we haven't really seen anything about him. He does fight Brainiac in this trailer, however, which seems like it could be some subtle foreshadowing.
You can watch the trailer below.