A quick closer look gave me this:
The Facebook post was posted on October 6, 2019.
That Rani post with the picture was October 5, 2019.
They both say 1 year's time.
That video said 2021.
We have conflicting sources, but they're all within a few months of each other. And they all seem to come from the same person. The 2021 one seems the most recent, so that's probably when.
Although, all this does seem a little fishy. Everything's gone now - which might mean the complete opposite (we've all seen Ford Riley's post about Kion & Fuli, no? The post where he said Fuli sees Kion as a brother, and Kion trusts Fuli enough to let her take the lead, then deleted?) of it not coming true. But again, the picture is such good editing. But Bunga's position is a little off. I originally brushed it off as part of the theme song, like he's getting ready to jump or he just landed or something. Hard to tell from a freeze frame. Rani and Kion seem to be in the right position, at the front, and the expressions work, too. If this is a hoax, whoever did this put a whole ton of work into it. I applaud them no matter what it is. If they actually have an internal source, they probably risked their (or their internal source's) jobs, if it's a hoax, they put a lot of work into it.