I stumbled upon this reddit thread which has a link to a tumblr post which has a screenshot of an Instagram post that shows that a VA was recording this August: https://www.reddit.com/r/stevenuniverse/comments/cqvzkq/a_va_new_to_the_show_johnny_hawkes_was_recording/?utm_source=amp&utm_medium=&utm_content=comments_view_all
https://bismuth.tumblr.com/post/187033785353/a-va-new-to-the-show-johnny-hawkes-was-recording
Given the fact that change your mind is said to have been recorded in 2017 and how with each hiatus the gap between production and release gets larger, this mean that this episode would likely be released in spring 2021 at the earliest. So either there is another sequel series after this or they’re pulling an Infinity Train on us. Also something else to notes is that all articles on the Steven Universe movie say it’s the “first televsion movie” rather than the movie which suggests there could be another Steven Universe movie. There’s also the nine season plan. And also I think they would feel obligated to tell us excplicity if the show was ending. They would never let something like that leak from an art book title. Also the way the show is described is not what Rebecca and Ian described when saying what cane next. I think this is essentially an epilogue to this story that ended in Change your mind and is essentially an extension of the first show and then there will be a sequel series which is the “something new, something different” that Rebecca and Ian described. Overall I think we can’t assume the franchise is over unless we have solid evidence. They would straight up say “final season” if it were the case.