This is the old win my title back trick, just fight at home and look bad and get knocked down again but win a close fight I actually lost fair and square and everyone complains except UK fans and that's a fact jack, we have seen this movie before.
Ruiz would be stupid to fight Joshua in the United Kingdom when he's the champion and calls the shots and lives in California, have the fight in Mexico or Staples Center or Vegas or New York or tell then to take one of his belts witch they actually will and give it right to Joshua anyway if they don't fight.
Watch Joshua fight someone else and wait for the belt to be stripped and given to him, just like they did to Riddick Bow for fighting Holyfield twice.