Ok the other revenant is now fully aware of our presence in his world, it was only a matter of time for a robot with near omnipotence over a dimension to notice. At the moment he's only playing with us for entertainment but I'm sure that'll quickly change since we're popping in and out and taking things.
And he's able to force people into being shadows but we can break his totems and free ourselves. Maybe in the future we might set the other world free and have a team up with the freed legends. But at some point I think we might go up against the shadow legends.