The fact that there are 10 uses of "Setup", and we haven't seen any of them yet, makes me think those are the Landmarks (at least most of them). If so, we'll find out tomorrow. Also, those may be the way to bid, unless the bidding is on a single Kingdom card.
Bidding in terms of taking debt would make a lot of sense, especially if it is in the "Setup" clause. That's the point where your decks are the least different, so the bidding would be very fair then - you don't even know yet what your opening split is going to be.