Luke has buggered off, The galactic peace he helped to forge is at risk and he is hiding.
Now if its just because his nephew going bad I’d be a bit let down.
If it’s because something he unearthed in his exploration of Jedi history I’d be intrigued.
But it it would be understandable that a plot point left hanging since 1983 might pay off and Leia in her studies and frustrations over bureaucracy and uniting the two halves of the galaxy took inspiration from her dad.
Big Lincoln Memorial Zombie is a better disguise than Palpatine used.
Luke nearly killed Vader just at the mention of Leia going bad, imagine what Luke would feel if he accidentally lured her to the dark side and imagine too how reluctant he would be to train a young woman strong in the Force that’s just tracked him down.
It makes for a more interesting next two films.
PS. I hate typing on smart phones