Early concept art of the finale 👀: https://mobile.twitter.com/PhilSzostak/status/1261017777608880128/photo/1

I think if we’re to have Kylo on Tatooine this would be a feasible way of doing it. We could have Kylo’s ship parked beside the homestead, creating anticipation for him to appear. This way you could get away with replacing the ghosts with Kylo. She looks to her right, smiles at kylo, he looks back at Rey, shot of Rey and Kylo silhouettes gazing at the twin suns, add the ghosts of Luke, Leia and Han for good measure.
Fin.

Edit: You could even have both the Falcon and Kylo’s ship take off towards the sunrise in separate ways.