See ya, Commander Keen Mobile. You will not be missed.
Going back to Frederik Schreiber's tweet, I wouldn't mind seeing Commander Keen getting updated with more modern graphics, so long as it isn't M-rated. Commander Keen doesn't need to be edgy like ZeniMax was pushing it to be. It should be made by those who actually care about the source material.
Imagine the experimental possibilities of a current-gen Keen game; stuff like alternating camera angles, more creative secrets and Easter eggs, polygons, fluctuating gravity, multiple weapons and other gadgets, spherical level layouts (want a level on the surface of a tiny moon or asteroid, anyone?), and so on. It's unlikely, sure, but still very much possible. Most of these ideas have already been done by this very modding community on the comparatively primitive Galaxy and even Vorticon engines, so think of what they could pull off with a modern engine.