Everybody's own decks cannot be on the list. That is the "popular" list. If the list was full of anything people wanted, I wouldn't be surprised to see haymaker 2.0 on the list. Sturtle, I have not seen that deck work at all. If you made it work, GJ, but it isn't the metagame nor can it be the BDIF if it is the only version of itself in the format. My answer is a toss-up between Dialgachomp, gyarados, and luxchomp. I feel gyarados might come out on top just because of its newly found varsitility. It can play against EVERYTHING. Lux hurts it much less because of Rescue Energy. Dialga is as good as it has always been, and same goes for luxchomp.
I doubt vilegar will win as much as you guys think it will because decks like Gyarados just destroy it. If gyarados is popular (which it is), vilegar cannot win. Gyarados starts with Sableye more often than not... and unless their Regice is prized, they have a actual probabilty (#games won/#games) of about 70%. Gyarados discards its trainers happily... and unless there is a lot of bad fainting spells, gyarados will win.