How about the gangnam style guy but as a zombie? Or him with a slit throat or something or do the slit mouth like in the video you posted
Sure a lotta people will be him, but not as a zombie. I think that'd be sick.
You'll have a popular costume idea, but made it original with your own spin on it. It'll have a funny side, plus a darker side. And the people that hate gangnam style will like the dude dead. Just gotta learn the dance lol