Star Wars fans recently experienced a wild reshoot process on Rogue One that had different outlets reporting vastly different information regarding the extensiveness of the reshoots.
Reshoots are typically a scheduled part of all major blockbuster films nowadays, so this is an inevitable stage for The Last Jedi.
Given the secrecy involved in producing the Star Wars films, it’s doubtful that answers about the reshoots will be immediately forthcoming, either from Disney or Lucasfilm, so fans may have to continue speculating until the film’s release.
Carrie Fisher’s death near the end of 2016 left fans in shock, but it has also resulted in Lucasfilm having to rethink its strategy for the future of the current trilogy.