For TROS, I want to look at hinting at Palpatine a couple of times after the battle of Crait ends, either using the radio or end credits (or both). I think that’s precisely what was always missing from the end of TLJ, because the way it ended left nothing to anticipate for TROS.
Glad to hear it! I’m looking forward to seeing some creative ideas on how to do this, it’s not going to be easy!