It's expected that Islam would be the favorite. And I would tend to favor Islam too.
Many factors in Islam's favor. He is fresh, healthy, strong, and has the Khabib style that can defeat any fighter.
Hooker on the other hand, has shown he can be beaten, just had a fight so isn't so fresh, etc.
However, Hooker is a bloody wildcard and a savage. Despite it all, Hooker might appear completely fresh, motivated, and brutal in this fight.
We never know. He might appear cool and composed like the fighter that damaged Dustin Poirier heavily in their fight.
In this case, Islam might find himself in trouble.
Basically, this is not a fight that's clear cut to me. On paper, Islam runs through hooker. In practice...Question marks.