he looks like a preorder bonus
You only got to see this version of the movie if you preordered your tickets. 😂
Regarding Luke haunting Kylo, I was thinking you could reuse the scene of Palpatine speaking to Kylo through the Force with Kylo hearing Luke. It would be hard to have Kylo see Luke, unless you had Luke sneak into one of his visions and say, “Ben! No!”