I dont think it'll be a big issue, I'm sure the NRL will work around it. They'll probably schedule Origin earlier.
Play some games in the bush, Gosford will be available.
I like that idea of playing games in NZ, I dont think Mt Smart is being used for the World Cup.
Mt Smart and Christchurch are free for use in NZ
Gosford, Win and Newcastle in regional NSW
Gold Coast, Redcliffe, and NQ in Queensland
All Sydney except Accor, SFS and Leichardt
There's no shortage of stadiums available
Be interesting to see what they do with Origin. I dont suppose the focus on the world cup will make much difference to interest levels so I guess it will go ahead as normal though Suncorp and Accor not available so will have to played in May and first week of June before world cup kicks off on July 19th (presumably the want the venues couple of week before to sort out pitch and warm ups?)