There's too mucn money to be made in this franchise to not make another one. Arad already said there will be a SM4 with or without Raimi/Maguire, so you can forget that. My guess is, being that SM3 made over 880M, that there is no way in hell Sony is getting rid of Raimi. What studio is going to want to get rid of a director, that directed three films worth 2.4 billion bucks, knowing that he wants to direct SM4?If Magure, the lead, doesn't want to come back... Save your money and start working on the next Marvel hero's franchise.
It's common-sense people.