I think it's stupid that some people are refusing to sign this because it's a "maybe" or because of the usual thing where it's just to get attention, but this isn't like that.
This is so they can see that people are still interested in the franchise, but there would be other things to consider even if they think enough people will buy it. It was started by a fan in the first place so the thing about Devs making us jump through hoops to get things doesn't apply. Would you have preferred it if Crytek had said nothing about this, giving people less of a reason to sign it and therefore less of a chance for the petition being successful?
This was just the CEO saying if there is enough interest, he will see if they can do something about it. It's nothing like the "like us on facebook!" sort of thing devs do all the time. Crytek aren't doing it for their own benefit like they do with those, Crytek aren't the ones who even started the petition - they just commented on it.