It will not be a surprise if Haney will win again, the one that should work harder here is Kambosos because his career is just starting to get better but if he lose again, he might have to start over again, which for some boxers it will lead to early retirement.
Many people rely on Haney abilities because he is superior to Kambosos, but within 5 months of the previous boxing fight then Kambosos will train hard to improve his abilities for the second fight, maybe his coach has reviewed some records in the previous fight so Kambosos should level up. I think Kambosos is still young so even though he lost for the second time then his boxing career is still long and he has had valuable experience to become a professional boxing career.
anything is possible to happen , because they are both Good boxer that has 1 punch down but of course it will be the training and preparation in which will decide who will win in this fight.
5 months training is indeed long , but remember that Haney is also preparing and practicing so this is a both effort and skills meaning? who will win or lose is the one that deserves the title .