Jon has essentially been taking down middleweights his whole career. Added weight, age, ring rust, and much larger opponent, I don't see him having much success.
People like to point out that Francis took Gane down, yes he did. But even with added weight and size, I don't think Jones matched Ngannou's strength.
Honest prediction of the fight....
Cyril has early success and puts pressure on Jones, possibly rocks him. Jon does what Jon does and there's an eye poke that stops that action. Jones can't get Gane down, but keeps him bay with outstretched arms and kicks. Gane can't get a good offense going and tries leg kicks. Jones times the leg kicks to try and take Gane down but can't get him down, so they clinch up against the cage. Jones does something explosive the last 15-20 seconds of each round. Jones takes a lackluster decision victory.