This is very likely going to happen, especially if the election results this year result in a much more favorable FTC who wouldn't block a merger, because everyone at this point knows which side is going to let corporate greed run amok without and checks and balances.
After this happens, you'll see the usual end results of a mega-merger:
1 - The C-suite execs and VPs all increase their pay or golden parachutes due to 'increased responsibility.' They all come out a lot richer, or with heavy buyouts if the position is eliminated, because of course - they're the ones making the decisions so they're going to pat themselves on the back.
2 - The rich shareholders at Blackrock for Humana, and whoever the big backers at Cigna are will definitely approve it because they get richer. Depending on where someone's 401K is, it might go up a pittance, but the big dogs will add tens of millions to their accounts and see that number go up.
3 - You'll get the business as usual types of emails about change, while behind the scenes they're preparing to eliminate 'redundancies'. Don't need two of everything now in the merged companies, so once again employees will get the axe.
4 - With less competition in a merged company, long term the prices go up because there's no one to keep them in check. Especially in a hands-off government that lets corporate 'rugged individualism' go wild. Insurance premiums in several markets go up, more profit for the rich shareholders and C-suite execs that live for that number going up.
5 - Chances are Louisville locals will be eventually shut out and continued to be scaled down as the corporate presence here and the tower has already been vacated. They'll have the usual interstate warfare for jobs and headquarters to whomever can give the corporate the best state and municipal tax deal - AKA - how much corporate welfare they can pull out of the taxpayer to funnel into their executive accounts or for the rich shareholders in the new companies.
Then life goes on, and everyone is told they didn't work hard or smart enough to keep their jobs and then people keep the same scapegoats they always have for losing their living. The cycle continues with the next megacorp.