#1 Roman Reigns
I can't really see anybody other than Roman Reigns winning Money in the Bank this year. The WWE wants Reigns as champion again. They want to complete the inspirational story arc of Cancer Survivor to WWE Champion and I think they want to do it in the near future.
Kofi is currently the WWE Champion and I really don't think he will be champion for much longer. They need a strong heel to take that title away from Kofi, and they seem to be determined to keep Roman as a face.
A top AEW star just called one of his colleagues 'spoiled' and 'narcissistic' HERE.
If WWE is smart about this, they will have Roman cash in on the heel that beats Kofi. That seems like the best way to get a Roman Reigns title win cheered and not booed again.
I don't think many people will like Roman being shoe-horned into the title picture again, and he may end up getting a negative reaction.