It's a big unknown at the moment, we've heard that Channels 7 & 10 want a piece of the action, plus Channel 9 have been quoted as saying "we're not going to lose rugby league rights". As for Fox Sports, no official word, only speculation for people after the AFL was done. Like Channel 9 though, they don't want to lose rugby league either.
As mentioned before, the SMH article is stirring the News Ltd pot as Fairfax love to do & the clubs are just eager to ensure the NRL doesn't get dudded like the last deal.
Until the IC is finalised, no-one can really say anything, but the negotiations will be a fierce battle ( which is great ) & I think it's safe to say that the NRL will get a hefty increase. Even if Ch9 & Fox Sports retain most of the rights, the others will push the price up to make them spend more & that seems like a bit of a win for everyone.