Even if no Superman: Red Son movie ever happens, the fact that such a thing is even being considered shows that Warner Bros. is casting a wide net with DC Comics properties.
The fact that Warner Bros. is willing to entertain the same idea in the movies is certainly interesting.
The studio is not simply looking at the traditional DC universe for stories, but are open to ideas from anywhere.
In addition to the existing universe, we could see standalone films that take the characters in different directions.