Actually wetleases this time of a year are reasonably cheap - and will continue to be so until end the March - lots of extra capacity on the market (taking widebody was a bit weird to me). Ofcourse there are extra costs on top of that etc but I dont think it is really big trouble maker for DY for a time being and certainly not in a big picture of dealing with unions.
I know setups where pilots deserve the sympaty from colleagues however I dont beleive a second DY is one of those. You loosing the original point - you will not have this job if DY will not exist. Some of you lucky enough would have a job with SK and the rest will be working elsewhere. And nobody stops you to work elsewhere - we are leaving in a free world dont we? Remeber there have been a number of airlines who were successfully destroyed by pilot unions to nobody's benefit.