This has of course grown into a sort of meme, calling Azmodan "Azmodunk" and many videos with commentary from the classic basketball video game NBA Jam "From Downtown!"
Anyway, Blizzard is aware of said meme.
This new skin for Azmodan gives the Lord of Sin a jersey and sweatbands and a nice big basketball to hold onto. His summonable minions get their own basketball-themed uniforms. And yes, this is not merely a skin, but incorporates new animations and voice emotes, such as "Doom-shakalaka!"
Anyway, this self-aware humor is one of my favorite things about Blizzard.