3 days ago:
While that would explain the extremely low screen time he got(Even Derpy got more screen time!), there are some logic holes that are of necessity to plug up here.
1: Who the buck would even date Discord? He isn't exactly a great catch, if you know what I mean.
2: A draconequus and a pony mating presents unforseen consequences in the bloodline of the pony that results. For example, oh, I don't know, the mare might conceive a draconequus, for starters! On top of that, the odds are extremely low that you'll get a pony like Button Mash out of it. JanAnimations had it right.
3: Shipping a pony witb a draconequus is bucked up, no matter what. You have to have the curiosity of the offspring of a graverobber and a homicidal maniac to even come up with this.
4: Buck it, I don't need another! This headcanon needs to be blown up BY a cannon.