I'll believe it when I see it. MSP-NRT isn't the only route that is staffed by the MSP base. Sounds like something taken out of context or somebody being waaaaay melodramatic about the merger.
I didn't take it to say the base is closing or anything. MSP will still have hundreds of flights. I took it mean that if she wanted to keep flying to NRT she'd have to move or commute. I'm hoping it ends up not being correct.