There are a number of possibilities as to Boeing’s response to the new RFP, but the possibility that Boeing would refuse to submit a proposal to the RFP.
While I don’t think that Boeing would be serious about a no-bid, it would be an interesting ploy to either get the terms and conditions reset to something more favorable, get a split order, or to get the Congress to give them the contract through legislation.
I actually think that this strategy is only marginally less likely than Boeing submitting a shortened 777, because I don’t think that they could meet a timetable for the bids or delivery with that.
H/T The DEW Line