I hope to see a lot of the features added to Godot that Unity refugees have been requesting and working on (because, yknow, open-source) and would expect to see at least 25% Godot 25% Unity 50% Unreal in the job market. Although honestly it is more likely that Unreal takes up a larger share of the market going forward, whereas in the past it has been like 60% Unity positions and 40% Unreal positions (due to Unity use on smaller projects, indie games, and use in the VR training industry).
Godot has been used mainly for 2D as it didn’t support 3D until fairly recently.