SE already know that "everyone" want a remake. They did a poll in the SE Party to know what FF everyone wanted to be remade, and FFVII won. Many people inside SE want to remake it. But the problem is... They don't have enough time and people to work on it(as stated by Nomura in his last interview, some days ago). They are working in so many different projects, that is impossible to do it now. A petition will NOT change this fact.