I don't believe there should be a super heavyweight division regardless of the size differences you may see in the division.
BUT
I also don't see the point in Jr. Flyweight, Jr. Bantamweight, Jr. Featherweight, and Jr. Lightweight. The weight difference between them and the regular weights is what 3-4 lbs for all of these. Tyson Fury outweighed Deontay Wilder by 42 pounds in the second fight, Riddikk Bowe outweighed Evander Holyfield by like 30 pounds in their fights. I don't have a problem with this at all, but if you expect heavyweights to deal with 30-40 pound weight differences, I think a Jr. Bantamweight can deal with a 3 pound weight difference of a Bantamweight.
Unpopular opinion probably, but I said what I said.