Nine were dreaming that Reno Rumble would succeed as a standalone show... It's only drawcard last year was that it was previous The Block and House Rules teams competing - and even then it got incredibly boring midway through.
At this point, Nine have re-cycled through every dud show they've aired and axed over the last few years, so surely it must be Big Brother's turn soon. The only thing going against it is that it's not a quickly assembled show - look how quick the turn around on Celebrity Apprentice was from when CBB2015 was canned to when it was on the air four or five months later. There is no way the can manage that with Big Brother.