While most of the speculation surrounding Avengers: Endgame seems to be around the introduction of alternate dimensions and the use of time travel, a compelling new theory suggests that Marvel might have a new trick up its sleeve. “There’s been some hinting and talk about Black Knight recently. There's been some hinting and talk about Black Knight recently. Apparently Marvel does have a plan for him in the MCU, and they already know how he'll be introduced. Avengers: Endgame picks up from the record-breaking Avengers: Infinity War.

Source: Hindustan Times January 06, 2019 11:37 UTC