Fans love heavyweights and it's getting good promotion, so it has that. Personally I will buy it but I buy all of them, I am a fan of Junior, I love the Lauzon/Miller fight and I think I speak for everyone on that, there's just no way that fight sucks, I'm interested in Boetsch/Costa and I do like me some Okami, Belcher's whatever but Yushin always gets a thumbs up from me, should be a good fight though. Leben/Brunson is whatever. Picket/Wineland or Caraiso/Moraga should be on the PPV instead.
Probably around 500,000-600,000. I do think the first fight will hurt it some but not too much to cause a massive difference. A 64 second knockout is a 64 second knockout no matter how you slice it, and it clearly wasn't a fluke.