We've heard for about a month that management was planning to sell the scheduled service.
Part of the reason for the present announcement is that an airline is required to give 90 days notice if they're pulling out of an international market. That is, if they ever want to re-enter it.
Then, there's not much reason to keep the OAK and DFW flying open, either.
Something's going on, and no one's talking at GAL/MP. I can't imagine that they'd just shut down the Hawaiian operation. No, it's not lucrative at this point, but it's pretty complicated. ATA has world-wide authority with all of it's aircraft. ETOPS and MNPS is worth something, but Mgt. still wants to play with the military teaming contracts to extract the most money from the government.
Polishing up the resumes here.