Okay, time to play devil's adovcate. Like I, and many others have always contended, styles makes fights.
Chuck matches up really well with wrestling/jits based fighters. Particularly in the cage. When Chuck has fought striking based fighters, he hasn't been able to KO, or TKO them with regularity. Chuck was getting as good as giving against Mezger, up until he caught Mezger. Likewise, Overeem was killing Chuck on his feet prior to eating a big right hand.
Amar and Murillo both gave Chuck a tough fight. Both of these fighters have good tight structures that are willing to stay on their feet and trade. Rampage will be content to stand and trade with Chuck. He has better striking than Tito, a better chin, and can slip as well as shield (Tito's fatal flaw). Page lost to 2 Chute Boxe fighters in Wandy and Shogun. Wandy beat Page in the clinch with knees, something that Chuck does not do. Shogun punished Page, but he is one of the better strikers currently out of Chute Boxe. In any case, it should be interesting. I hope to see a competitive fight, but as a betting man, I would still take Chuck to win. (Retrospectively, Page wins dull decisions against grappling based fighters like Dong Yong Sik, Bustamante, Matt Lindland) BTW, he should have lost to Ninja.
For those who say Chuck hasn't improved, he definitely has. His footwork has gotten a lot better. He was cutting good angles setting up his looping overhands and uppercuts. This is one of the reasons he is able to keep his hands so low, and remain flat on his feet. When Tito threw a straight right, Chuck would be somewhere else, and counterpunches.