Djokovic won't play that badly twice and I am not sure Wawrinka is playing that well this year. Last year he came into the AO in form. Just seems to be moving poorly. Could be wrong, but I have watched a lot of Wawrinka's matches as I love watching him. He was shocking at Kooyong. Everyone will say exhibition, blah, blah. However, movement shouldn't be something that is lacking.
I'll be boring
Men : Djokovic
Women: Serena
Bolter (people whe never won a slam) : Definitely Wawrinka
Women: Bouchard (No chance in hell really, has some game though).