Ruiz is taylor made for Wilder. He has no head movement. And when that happens, you're getting KO'd vs Wilder.
If he beats Ortiz then I'm sure it will happen. PBC like to keep things in house, so it was a pretty obvious next move. I can't see Ruiz beating Wilder. Wilder likes to keep things long unlike Joshua so the chances of him catching Wilder with a counter is unlikely and with Ruiz's lack of ability to cut the distance quickly enough, he'll no doubt walk in to a big Wilder right hand and get laid out.
I'm not sure Ruiz gets past Ortiz, if he somehow manages that, Wilder hits him so hard, his blubber emulsifies and he gets double full leg gout before the match ends.