The long and short of it is EA locked Joshua and Fury up to exclusive deals, and this relates to their inclusion in UFC 4. Prince has a deeper breakdown of how that deal came together with EA — and how it fell through for Steel City — and for how long these two boxers might be locked up with EA. Regardless, there will be a create-a-boxer feature in ESBC, so Fury and Joshua can still make it into the game via community creations at least.
On the bright side, there is a new look at the prototype for the ESBC Championship belt, which you can also find in the video.
How bummed are you to be missing out on Joshua and Fury in ESBC?