Guessing here.

There are 58 retirements by 04/01/15 listed on the most recent bulletin. Only 5 of those are DEN people. So, DEN isn't going to reduce via retirements at all. And based on the last displacement bid done here on the 76T and the Bus, most pilots seem to be choosing to stay here and bid what's available rather than chase the plane and/or upgrade and commute. Lots of brand new 737 captains from that displacement and probably less than expected went to WB flying in other domiciles.

So, unless they drastically increase NB flying or open a WB fleet here, retirements, at least in the next few years, won't have much of an impact.

But that's just a guess.