His game is great but far from perfect and I think that mental condition will be the key in fight against Pereira.
As much as I like Adesanya I think that he can be little cocky sometimes and he can pay the price for this.
Somehow I think Adesanya and Pereira fight is not going to go full distance. Probably it will last for 1 or 2 rounds only. Reason - I think Pereira is not quite ready for MMA fights, I think he has not much experience of how much strength and stamina fighting at the fence or on the ground take and how much should be saved. Cant explain why, but I think Pereira is going to rush in this fight.
Experience-wise, I agree, Adesanya has the upper hand. But as notblox1 said, the cockiness might get the better of him. That is a chance Pereira should take like how Weidman defeated the Spider Silva because of playing too much in the octagon. Being a champion for long has that weakness of overconfidence while the opponent is hungry to snatch the belt from him.
Both are standing-style fighters, take down defense is high. Will Pereira try to mix it up by training for a takedown and play it on the mat or will he just try the same kickboxing style?