I could see them adding the 177, if for no other reason than to keep up with the competition.  As I said before, they already have most of the code they would need in the 757/767, just a matter of adapting it to the 737 (could be difficult, I honestly don't know).  That and modeling/texturing the 177 in the VC.  I can't say everyone wants a 177, but it would seem a healthy portion do, and it would be a shame for CS to ignore that.  

For me I am enjoying the 77, it's actually quite nice for its time.  However, when I fly, I always use a delta paint and have found zero evidence that Delta ever had a Sperry 77 equipped 732. So, for that reason alone I would like the 177 even though the 77 in the end gets the job done.