Guys, as a JB pilot I wish this were true, but I can't see any way this would happen. It would require huge NYC divestitures, not to mention the gigantic price premium UA would have to pay for JB. JBLU is currently valued at $5.6bil market cap, and I'd wager the BOD would want $8-10bil valuation at least for their baby.
And the DOT/DOJ would just pee their pants laughing at the idea.