I thought it totally ripped off the whole Santa Claus thing. I went as far as to mentally tie in Santa Claus: The Movie with Dudley Moore with Arthur with Russell Brand, although I know that's not particularly fair. I thought the whole thing was a little too dead-on and they should have worked a bit harder to come up with a different background and "legend".
Still haven't seen Arthur. Kind of afraid to. It's like when I went back to my favorite childhood fast food place and the food was shit and there was a full inch of dust on the ceiling fans
Ok, not like that at all but MY DISAPPOINTMENT WAS REAL.