I wouldn't be surprised if Wright Runstad already has an option on the Safeway properties, maybe the bottling plant too.
I also did a little dumpster diving on the internet and found a Safeway "Supplier Guide" (available
here). I was honestly shocked to see that the Bellevue plant is a HUGE part of their operations. They only have four ice cream plants in the US and Canada--and the next closest one to us is in Edmonton, Alberta! Otherwise, you're going all the way to Phoenix to get Safeway branded ice cream products manufactured. There are bread and milk plants in Portland metro (Clackamas) but that's it for the whole PNW, and presumably Montana, Wyoming, and the Dakotas. They may also use contractors to make their products, but with the specialty equipment needed to make all that stuff I wouldn't be surprised if they did it all themselves.
Anyway, in light of this, two things come to mind, which are somewhat in conflict: First, the Bellevue plant is probably hugely important to Safeway's everyday operations so I can understand why they would be reluctant to move it. Second, if it's truly serving a regional or interstate market, there's no need for it to be in such a valuable location. It could easily move somewhere else along the I5 or I90 corridor.
Time will tell...