Mr J,
Goldmember has provided interesting background info regarding previous history of matches between teams this year...for AFL and NRL...

Last weekend in the NRL for instance, Manly Sea Eagles and Newcastle Knights won at home against highly fancied Dragons and Bulldog outfits...so they are 2 homedog results...not sure about the larger (neutral?) stadium though..how that works?

AFL, I have not been successful so can not assist but there are always upsets between favourites and lesser teams (last weekend being a classic!)

Good luck in getting it together Mr J...reckon that S12 is such a unique situation in sport given the results though!