"Insider" claims that a teaser is ready for reveal. (This is the same guy who claims that the opening scene of Dark Phoenix begins with a space ship crashing near the Xavier institute)
https://twitter.com/TheInSneider/sta...14354270191616
It also looks like Josh Boone has completed the first screen test for New Mutants.
https://www.instagram.com/p/BZj0zKlF9vJ/
Now I'm going all in on my prediction. We'll see a trailer on Oct 31st. I think a teaser will appear much earlier at the Fox panel at NYCC.