I don't think that they will but there are some reasonable reasons why they would.
1. If you look at SWA's entry into virtually every market you see the same exact trend repeated. BWI, MDW, OAK, PHL, DEN, ect. SWA enters, prices drop, at least one carrier departs the market, prices rise and SWA captures a profitable market share. We (F9) have not left DEN yet, so prices are still very soft. If we were to leave, prices would rise and the market would be profitable for SWA. SWA could purchase F9 and have the same effect has driving us out of the market. The question is how much is SWA losing per quarter in DEN and how does that relate to our "price". This made more sense late last year compared to today.
2. If RAH enters the market and keeps F9 in denver in some way, shape, or form then SWA will never accomplish their mission. Prices will always remain soft and SWA will be competing against F9's much lower CASM or even worse, RAH's fleet of 190's. RAH's entry into the DEN market should increase SWA's interest exponentially.
Who knows what will happen, if my career wasn't on the line I would find the entire thing rather entertaining. From where I sit, it just sucks.