2 young, prime, black, undefeated, olympic medalist, world heavyweight champions with incredible power and KO streaks, though shown vulnerable in their last KO wins. Both from the Allied powers so there is a natural friendly rivalry that's hotter than ever for the undisputed heavyweight crown without facing the reigning champion (Fury) that boxing can't afford to wait on for lineal supremacy.
Waiting is bullshyt. Cuts, injuries, bad performances, an unexpected loss, age/wear-n-tear... These things are avoidable and unnecessary.
Again, I would not fault AJ for taking Wlad 2, Pulev, or Ortiz next. However, the biggest available fight that can be made and should be made IMO is against Wilder.
There's nothing left to build at this point.
Thid isn't like, for example, Ohara Davies and Jack Catterall. 2 young, undefeated British 140 fighters, but making that fight now would be a major disservice to the mega, in-house fight that could be made down the line.
Or, Tank v Walsh. This should be a much bigger fight but Walsh is not as proven, though a good boxer, to be world championship caliber.
In conclusion, due to 1 fighter or both's disposition, some fights need building. This ain't one of em... Strike now before something unfortunate gets in the way.