Joshua vs Klitschko Alphabet Titles, Rematches and Mandatories Saga

How do you reckon this will play out over the next couple of years if Joshua wins? On the night the vacant WBA, Joshua's IBF and the vacant IBO title are all gonna be on the line. There will be a rematch clause no doubt and then the various bodies will start pushing for their mandatories. My guess is there'll be space for another fight then a rematch. There is Wilder with the WBC (who I think is the only real challenge out there to AJ) and so there will be a massive stramash about getting that fight on the slate but the other guy with a title is Joseph Parker from New Zealand with the WBO which would be worth doing to get more belts together and the vague possibility of Tyson Fury fighting AJ. Still there probably will have to be a mandatory before or after a rematch. I'm gonna guess rematch, mandatory, mandatory, mandatory, WBO champ, mandatory, mandatory, mandatory, mandatory, Wilder. So that puts a Wilder/Joshua fight three years away. Any chance it could be sooner?