I could see a U/B Infect deck doing well but not really breaking out.
No there won't be any breakout decks. The decks in the format have already been established and tested.
No. There are just going to be fluctuations.
I don't think there will be . . . there're so many good decks and everything's so proactive that it's hard to attack the format.
Not really. The decks are all pretty known it's just a matter of what's well-positioned at the time.
I think the biggest impact will be Barcelona this weekend—the Opens have defined the metagame so far. It won't change substantially as it's only in two weeks.