Only if Kylo Ren invents it in his mind. It won't be really Han since he wasn't a Jedi. It would just be a dream.
Aksoka only lessens Rey's importance of top woman. I don't think they would have had a series with a female lead if they knew there would be new movies where it would have more impact.
Billy Dee had back issues during filming so he wasn't available. Maybe he'll be better for later on.