If I was Wilder i would be very keen to make that Joshua fight in April. Then make the re-match with Fury for all the belts in Vegas at some point in the future.. which would become a monster PPV event. I don't think AJ/Hearn will be quite so keen.
I think AJ would have a problem with Wilder. AJ is there to be hit, little head movement. Wilder has freakish power. I think he would have a problem Fury too based on his performance on Saturday.