I think, assuming this fight goes ahead, AJ will be dangerous as he has nothing to lose and will go for it. I think people need to realise who he just lost to. Usyk isn't some chump, he lost to the pound for pound #1 boxer. He did much better in the 2nd fight (though I don't agree with the fight being a split decision) and that version of AJ troubles most heavyweights.
If Wilder, who isn't close to being as technically as good as AJ, was able to land big shots on Fury, why do people assume someone who is more accurate with their punches couldn't. Fury will not be able to fight AJ the same way he fought Wilder or Whyte. AJ is able to throw fast combinations, is underrated on the inside and is physically stronger than Wilder.
Of course Fury would be the favourite going into the fight but I've always had the feeling that AJ beats Fury. It's a much easier fight for him fighting Fury than it would be Usyk.