If he wins this, then they're gonna hold that belt hostage until him and Fury would make Eddie Hearn millions so then Fast Eddie can cash out.
The IBF do enforce their mandatories so hopefully Joshua will face the winner of Parker/Takam or Pulev/Chisora this year or early next. Someone like Pulev could be a very tough test for Joshua as could Parker if he shows decent progression. I doubt the fight with Fury happens before the back end of 2017.