Come on...if Jones had wrecked his knee in camp he would 100% have pulled out of he Gane fight.
Gane who btw made every striker look clueles, only won clearly one round against badly injured Ngannou.
Now for the style matchup: Jones has shown vulnerable to dirty boxing exchanges against DC. Ngannou is great at that
He also would have struggled in wrestling, early and late, because Ngannou has the basic skills, raw strength and stamina. Entries would be dangerous, and failed TDs would get punished.
He would have struggled in striking because Ngannou has the longest reach he has ever faced, power, chin.
Realistically, Jones path to victory would be to emulate Gane's gameplan with long range push kicks for 5 rounds and avoid getting caught. Or be real sneaky with the TDs and keep Ngannou down (not easy).