Provided I can be bothered with making the costume, I would go as Ash from Evil Dead 2 and Bruce Campbell vs Army of Darkness.
But, I kinda need a toy chainsaw of sorts, plus a toy shotgun, and I have NO toy shops near me. I would order online, but I don't know of any good online retailers for this.
And this all depends on whether or not the SU here is doing an actual Halloween event, and that it won't be some lame theme where I won't fit in at all.