Since the movie is ultimately called The Rise of Skywalker, that has led to a lot of speculation as well. Are there any Skywalkers in that photo above, which J.J. Abrams used to mark the end of filming? As far as we know, no, but there may be twists ahead. Luke Skywalker himself, played by Mark Hamill, is meant to return despite dying in The Last Jedi, and Emperor Palpatine appears to be rising as well, despite being killed in the original trilogy.
Article source: https://www.cinemablend.com/news/2471279/the-true-story-behind-this-star-wars-the-rise-of-skywalker-wrap-photo