According to the trailer, Revenant was once the deadliest hitman of the Syndicate. That ended when its programming got messed up and it became self-aware. Now Revenant doesn’t really care about its previous job.
The trailer suggests that even though Revenant is now self-aware, it isn’t completely well in the head (CPU?). Revenant sees itself as human for an unknown reason. It’s still possible that Forge will make a comeback considering his sponsors are Hammond Robotics.
We’re just a few days away from the start of Season 4 on February 4.