I predict Kabayel will fight Justis Huni in his first defense

Let's derive it.

Frank Warren says that Agit will fight a "top ten" guy. So let's figure it out through process of elimination:

Current Ring Magazine top ten, plus champ:
Usyk
Dubois
Kabayel
Fury
Hrgovic
Wardley
Sanchez
Ajagba,
Itauma
Gassiev
Huni

WBC top ten...
Fury
Okolie
Itauma
Hrogic
Joshua
Sanchez
Wardley
Wilder
Verhouvan
Ajagba

Combine all names on the list and you get...

Usyk
Dubois
Kabayel
Fury
Hrgovic
Wardley
Sanchez
Ajagba,
Itauma
Gassiev
Huni
Wardley
Wilder
Verhouvan
Ajagba
Okolie
Joshua

We can definitely eliminate:
Usyk- vacated the title because he don't like the fight
Dubois- WBO champ, going to fight Wardley
Kabayel- can fight himself
Fury
Hrgovic- IBF champ, just fought
Wardley- going to fight Dubois
Sanchez- in line to fight Hrgovic, and already lost to Agit
Ajagba
Itauma- Just lost
Gassiev- WBA champ, no mention of unification and negotiating with Miller
Huni
Wardley- going to fight Dubois
Wilder
Verhouvan
Okolie
Joshua- negotiating with Fury

That leaves us with:

Fury
Ajagba
Huni
Wilder
Verhouvan
Okolie

We can probably eliminate...
Fury- mentioned Kabayel's name as alternative, but is still probably negotiating Joshua
Ajagba
Huni
Wilder- Already lost to Kabayel, and negotiating with Usyk
Verhouvan- rumors are he priced himself out, and talking of fighting another kickboxer
Okolie- Seems to be on PEDS bust

That leaves is with:

Ajagba
Huni

Of these two, I would say....

Ajagba- Zuffa fighter and thus not available,
Huni

And so, in my opinion, barring a black swan, Kabayel will be defending against...

JUSTIS HUNI

I could also see...
Parker being brought in as a "top ten" of somebody's list,
Miller getting the fight because his manager was lobbying for it, and he is "top ten" in WBA,
Fury announcing he is giving up on Joshua
Verhouvan came to terms
They threw a ton of money at Gassiev for a uni
Okolie beat his PEDs bust

But my prediction will be Justis Huni.