Agree with Hearn, almost every fight these days is carefully matched so the winner is already known.
It's quite rare to have the best 2 fighters in the world at their weight actually agreeing to fight each other. Spence is very highly rated so it will be a really tough test for Brook and well worth seeing.
It's a throw back to when the best fighters used to be matched up with the best.
These days almost all the top fighters are advised to prolong their careers and avoid each other for as long as possible. Should be a great fight.