According to Ben Mendelsohn There Are "Enormously Different" Versions of STAR WARS: ROGUE ONE
We all know about the drastic reshoots that were done for Rogue One: A Star Wars Story. A lot of the footage that was replaced can be seen in the trailers that were released for the film. A lot of that footage was part of the final act of the film. There was obviously a different outcome of the story. We don't know the details on what this original ending entailed, but in an interview with Collider, actor Ben Mendelsohn, who played Director Orson Krennic, said that there's an "enormously different" version of the story that exists. He explains:
"We did have multiple, multiple ways of going at any given scenario, we had multiple readings of it. So should they ever decide 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."
He was then asked if there was an alternate version of the story that exists because of the differences and his response was:
"Absolutely [there is a different version], with enormous differences within I would’ve said 20 or 30 of the scenes. There really would be. There would be enormously different renderings."
I would really love to see the different scenarios of how this movie could have played out. I hope that they will include all of this alternate footage on the Blu-ray. Hell, would it be cool if they actually recut the different versions of the film using that unused footage!? That would be awesome! I doubt it'll ever happen, though.