Lucasfilm
The most recent example is an interview with actor Ben Mendelsohn, who plays Orson Krennic in the movie, in which he hinted at the amount of alternative footage there is for the movie. So much that he believes an "enormously different" version of it could be released (if Lucasfilm/Disney ever wanted to do such a thing).
"We did have multiple, multiple ways of going at any given scenario, we had multiple readings of it," Mendelsohn told Collider. "So should they ever decided to, there would be a wealth of ways of approaching these different things. And I know from having seen sort of the crucial kind of scenes throughout it, I know there's vastly different readings of at least four of those scenes… enormous differences within I would've said 20 or 30 of the scenes. There really would be. There would be enormously different renderings."
Comparing the footage in the movie to what was teased in the trailers proves that there were many different options, especially for the ending, which underwent major reshoots. But Mendelsohn's comments will feed fans' interest in seeing alternate versions of this movie.
Disney/Lucasfilm
It certainly would be a major seller (I'd love to see how Jyn, Cassian, and K-2SO ended back on the beach after getting the plans for the Death Star and where they were headed) and you would think Disney would want to control that aspect instead of releasing deleted scenes that someone on the web can cut into a pirate alternate fan version.