If this fight is made, and it is being mooted, would Khan's speed by enough to befuddle the Russian? I doubt Khan can spark Kovalev, but if he gets a feel for him early, he could cruise to a landslide decision.
By defeating the Russian, it will also silence the Khan detractors, who say he is 'ducking' Golovkin. Both Amir and GGG are playing a a waiting game, maximising interest, aka Money-Manny, before they get it on.