There's only two responses FF will get.
1. People will eat it up like crazy. F&F is insanely popular. The 7th movie made over a billion dollars. Harry Potter, Star Wars, James Bond are the only IPs I can think of where any movie past the sixth made that kind of money. (I'm ignoring Marvel because that's a collection of IPs).
2. It'll crash and burn. People will want to be psyched for the ride and just end up massively disappointed.
Frozen set the precedent for F&F (killer IP with a crappy ride), so I'm thinking Frozen's perception over time will predict FF's over time.