NHL commissioner Gary Bettman said his “gut reaction” is that the renovated Nassau Coliseum is not a realistic option for the Islanders, even on a temporary basis. “I don’t view the Nassau Coliseum as a viable option,” Bettman said Friday at a news conference at Citi Field to announce the Winter Classic outdoor game between the Rangers and Buffalo Sabres on Jan. 1, 2018. Nassau and Suffolk legislators held a news conference at the renovated arena in July to drum up support for the Islanders to return to the Coliseum, even as a temporary home while a new arena for the team is built. “Ultimately, whether or not the Islanders want to consider that and bring it to the league or something, you’ve had to ask them about it,” he said. “But my gut reaction is it’s not a viable option.” The Islanders, Nassau Events Center and Nassau County declined to comment. The Islanders are preparing to submit a proposal to build an arena at Belmont Racetrack in conjunction with Oak View Group, a sports arena development company backed by Madison Square Garden, and Sterling Project Development, a group run by the owners of the Mets.