Wilder KO3. Helenius chin in relation to his opponents power is weaker than it is for Wilder. And Wilder has better defense.
I doubt it but i do think Helenius will give it a good go. 1 thing is certain and thats somebody is getting knocked the **** out!
Unlikely unless Fury ruined Wilder. Helenius is far too upright, with his chin in the air and his tendency to lean back to avoid shots has already seen him KO'ed by right hands vs Washington and Duhaupas and Wilder hits far, far harder than either of them. Wilder by brutal highlight reel KO.
As bad as Wilder's defence is he at least moves his head and makes the most of his size, Helenius in contrast is way more upright and just leans back, he's a sitting duck for Wilder step in right hand.