The whole X world was pretty played out after X, and X-2 was an abomination that pretty much insured that nothing would ever be interesting enough to make me want to go back and visit that world again. Hopefully they'll just leave well enough alone and never release another actual sequel. There's no need to, and sequels are one of the things killing any interest I have left in the series. There's not much worse than getting two sequels to a game you didn't like, and that being everything you've gotten all generation.