With Harrison Ford having suffered a leg injury and his character set to play an integral part in the currently filming "Star Wars: Episode VII," there was talk at the time of his injury that the production may have to take a break for a few weeks to give Ford time to recover. The studio essentially scoffed at the idea as it was thought the film's production schedule could be shifted around to accomodate recovery time for Ford.
Then it became clear Ford's injury was more serious than first reported, a broken leg that required surgery and eight weeks of recovery time (and even then wouldn't be back to full strength).
Now, a new rumor has emerged from Jedi News who claim a number of sources are telling them that filming on "Star Wars: Episode VII" could be pushed back to allow Ford the necessary time to recover.
They say a meeting was called earlier today at Pinewood Studios in London to decide how best to handle the situation moving forward, the worst case scenario being the production begin pushed back "by a substantial amount of time" which then could well have an impact on the December 2015 release date - most likely moving it into May 2016.
Neither Disney or LucasFilm have indicated if filming might be delayed, though a Lucasfilm spokesperson has said "there is no change in the release date" at this time.