Ok I didnt watch BBLB but I heard George lamb said there will be a suprise in noms.
Possibilites:
1) Nominate 2 housemates you want to stay!
2) Face2Face nominations.
3) Everyone nominates then all there nominations are shown on the tv!(Kinda would be better as they would say stuff in the diary room they wouldnt say to face)
4) A task, whoever completes the task isnt put up(for example whoever finishes within 1 minute is saved but the rest are up)
5) No-one nominates but like mabye the first two people the talk to they nominate(like in bb10 when they refused to nominate they did this?)
6) The same as number 1 except bb tricks them and they think there nominating two people to stay but really its to evict!

EDIT: 7) Mabye like bb7 when its a vote to save in pairs(That would be good)
Thats just some silly ideas to what it could be!
I dont think everyone will be up as there would be no point in banning Joise, John James & Dave from nominating Sam!