After watching KOTM, I want to see Legendary vs. Shin more than ever, they're the total opposite poles of what Godzilla is while still being Godzilla.

Legendary is the guardian of the planet and the environment, the apex predator that stand as the true ruler of the world, he and the rest of the titans emits radiation that is beneficial to life. he is probably older than humanity itself and may be the one that pushed our evolution forward.

Shin is a radioactive mess that is completely the byproduct of human nuclear activity, it represents human irresponsibility at its worst, is a complete destructive force that leaves nothing behind, much like the elephant foot in Chernobyl, its dangerous just to be near that thing.

Legendary is what Godzilla became to the fandom in general, a hero. Shin is what the terror 1954 was meant to represent

"But wait, Kong, I thought you were in the Gozilla suit?"
"I am in the Godzilla suit, I thought I was doing a pretty good job."
"But wait, if you're King Kong, then whose…"