I can only guess since there is no timetable. But if you look at the way the NMB operates they tend to favor allowing time to force workers to negotiate against themselves. I've spoken numerous times how the status quo now only applies when its in the carriers interests, thanks to BK.
They let AMTRACK hang out there for eight years. Look at what they've done to Fleet, nine months and no talks, no release.
Its only when there's the appearance that operations may be significantly disruputed outside the process that the NMB will move to encourage the workers that there is some fairness in the system to bring them back in. Apparently everything was fine at Amtrack, apparently they never engaged in sick outs or work to rule activities and not enough people simply quit. In other words despite what their Union was saying at the table the workers through their actions indicated that the status quo was acceptable. I dont even recall ever seeing any informational picketing. So if everybody is sending the message that they are happy then my guess is it could go another five years, if the workers start letting them know how unhappy they are we could have an agreement by Easter. "This the business we've chosen."