This Thanos/Darkseid variant has also been seen teaming ... and absorbs their power. After beating The One Above All, he does the same, being the true one above them all in terms of his power.

However, both sides of the regime must work together to beat ... Thanos in the MCU. With two games in the series already, Injustice 3 is the perfect time to bring in a threat as big as Darkseid.