Don't think the Dusty one is licensed to fight, also highly unlikely that he'd be permitted to fight someone as experienced as Zarrafa when he hasn't actually stepped into the ring Amateur or Pro before. It'll just be a bit of media noise.
..... and there is no way the RFC would give Dusty permission - their biggest individual investment with plenty of years to go on his contract - just no way would it be allowed to happen even if Dusty wanted to.
Life after footy is different