I don't know the above fighters you listed have been in the sport for many years. Cormier has been on the scene for what about 2 years and Silva for about 5 or so? It is Silva who has the nasty bear hug that weighes down fighters.
6-04 vs 5-11 (listed) but I think he might be more like 5-09. About a 10 inch reach over Cormier so getting inside is already a problem. About a true 35-40 pound difference in weight and even bigger difference in muscle versus fat weight between the two. Silva will drop down to meet the 265 weigh-in but the sheer size is going to be obvious come fight day. Then Cormier will have to push around and pick up the bigger, stronger fighter all fight long when he isn't exactly in the best of shape? He was in great shape back in his wrestling days but too many cheeseburgers have taken a step or two out of him. Cormier is a wrestler with okay stand up. Silva has the better stand up and BJJ to go with good wrestling.
The question is........will Cormier be able to get him down, out muscle him and do what?? His only option on the ground is pounding out or lay and pray to out point each round. He does not have any BJJ skills to submit Silva whereas it is the other way around.
We will see come fight day but I see this as being a one sided fight that will end by the 2nd if not sooner.