Mark Messier’s future with the Rangers’ organization remains in doubt after being passed over in favor of Alain Vigneault to succeed John Tortorella behind the bench. “I don’t really know what Mark is going to do,” general manager Glen Sather told The Post last night. “He was very disappointed when I called to tell him that we were going to hire Alain. “He said he wanted to take a few days and would call me, but we haven’t spoken since.” Messier, who is absent substantive coaching experience and therefore shouldn’t interpret the hiring of Vigneault as a snub, has spent the last four seasons as a special assistant to Sather. The Rangers, who reached agreement with the former Vancouver (and Montreal) coach over the weekend on a five-year contract believed to be worth $10 million, will hold a press conference tomorrow morning at Radio City to officially announce the hire. Sather, who has been cryptic regarding the reasons for firing Tortorella, declined again last night to provide details regarding the decision to change direction in the aftermath of the club’s second-round, five-game defeat to the Bruins. “I’m not going to start dumping on Torts,” Sather said. “He was very good for us when he first got here, gave us a lot of discipline and taught the players a lot of good things. “Whether he could have gotten us over the next hurdle, I don’t know. I couldn’t be sure he would. There were things that happened along the way, things I picked up on that gave me a feel about the team. “The players didn’t come to me with ultimatums,” the GM told The Post. “It wasn’t that way. I hope people recognize that I have enough integrity that it wouldn’t be a spur of the moment decision. “But I did think we had gotten to the point where we needed a change. And so that’s what we did.”