It would be a good fight. Joshua would land some good bombs and have his moments but Liston would dismantle him with superior boxing and punching. And it would only last 3 rounds or less.
I’d go with Joshua here, Liston preyed on smaller guys his whole career, his best win is a chinny LHW. He’s never been hit by skilled guys who are 240lbs of pure power punching muscle. Why would anyone go with Liston?
Because Joshua's best wins are a two forty year old men and a fat flash in the pan who's name we only know because he beat Joshua all over the gaff.
You'd pick an ancient Klitschko and an old Povetkin over a prime Machen and a prime Williams? Based on what? Williams only ever lost in his prime to Liston twice, and a razor thin fight vs Terrell, a man who he also stopped. Machen blew hot and cold, but the only two men who ever outdid him in the skills department is Harold Johnson and Liston himself.