If you’re reading this part of the article you now know for sure that you will get to see a modern update of the metal titan in the 2021 movie, but you’ll just have to speculate about how he plays into the part.
In an effort towards full disclosure, I have personally seen Godzilla vs. Kong, and therefore am fully aware of how Mechagodzilla factors into the new film – but I am going to allow that much to be a surprise that the blockbuster delivers itself.