Wow, of all the rounds to choose 4 winners...
These are all crap. The ironic thing is that these sets all get at the heart of what the Ideas line is/should be, but none of them are particularly interesting.
The only possible winner is the Orient Express - if they do it well. There will certainly be inherent fans of the set because it's a train, but also plenty of us that have essentially no interest because it's a train. If it's well-detailed with plenty of minifigures, then you could have something.
The bugs will do no better than the Birds set did years ago, and I don't recall that being a great seller.
No one is going to buy that space set until it's heavily discounted. I love the space stuff from Lego, but this is just boring as hell.
The Polaroid camera is nostalgia in all the wrong ways. Another set looking at a short production run and likely significant discounts.
Once again, the better sets are left on the cutting room floor. I'm ready for the next Bricklink sets - and let's get some printed instructions this time!