I'd be surprised to see tonights fight go as long as it did if Wilder was swapped out for Joshua. Would have felt a KO 1-2 most likely
We'll find out soon enough. Joshua is rated #2 by the WBC. If Wilder fights Povetkin in September and wins, Joshua will be Wilder's mandatory before the end of September 2016. Wilder will have close to 40 fights by then. Joshua needs to start fighting more. He's almost "on the clock."