At this point, it’s safe to say that a large amount of The Rise of Skywalker theories connect Snoke and Palpatine together, going as far back as the latter’s Operation Cinder.
The Rise of Skywalker is going to have to address the connection between Supreme Leader Snoke and Emperor Palpatine.
The latest Rise of Skywalker theory originated from Reddit.
J.J. Abrams and Lucasfilm are doing a pretty good job of keeping the plot of The Rise of Skywalker under wraps.