Discord is the embodiment of everything disharmonious, chaos, destruction and entropy. The anethema of society, friendship, love, etc
This will end with his permanent imprisonment or destruction, and Celestia better finally grow a pair and do it. This is getting ridiculous, Twilight was right to chew her out, in fact she went no where near far enough and it's time she got over her feelings for Celestia.
Or maybe to give into them.
What?! Who said that? I certainly didn't! That's crazy!
Seriously though, yeah, I get the feeling this episode is going to be a "love it" or "hate it" for the older fans. Me, I love it, because I don't think Discord's done being Discord.