Apparently Sony is saying that it isn't true. I didn't read the entire thread so idk if someone already posted it.
Sony, however, had made a claim that Fumito Ueda's leaving would in no way affect the development of the game. GameStop have removed the game from the company's website, despite Sony's senior director, Patrick Seybold, claiming the cancellation is not true. So, what's the score here!?
http://www.thisisfakediy.co.uk/articles/games/is-the-last-guardian-cancelled