You should probably go over to Yahoo Finance or another online finance site to read the 8-K filed with the SEC by LUV and AAI on the 27th of September, then. You know, the document that refers to itself as the "merger agreement."
Ok, I will capitulate that there is a "merger agreement" relating to this buyout. I would like to point out, though, that it is an acquisition and not a merger, since LUV stockholders are getting nothing out of this (except maybe more valuation) whereas the AAI stockholders are getting a premium for their AAI stock, which will cease to exist.
You should really stop doubting things until you get some actual facts from your union reps, because you're starting to make a fool of yourself. SWA is bound to the contract that we have in place on the date of corporate closing. Sorry, that's just a fact.
I highly doubt if SWA is bound to a contract that comes into place after the CDN, unless they want to be. However, since GK has indicated that his intention is for the two operations to merge eventually, he will probably have no problem indicating that he will abide by the scope provisions of your new contract. Of course, if he changes his mind, there may be nothing you can do about it. After all, he is buying you so I'm sure he gets to determine what 11th hour provisions he will abide by.
Arbitration, on the other hand, is a different story. Any substantive changes that you have made in your new TA will have no bearing on the (probably) inevitable arbitration. (e.g. the pay rates in your new TA will not be considered as relevant, since they were not in place prior to the CDN. Ours may be, though, since they were retroactive to Sep 1st and were established by an existing contingency in our current contract)