#4 Velasquez's mainstream appeal
Having spent ten years as a high profile fighter in the UFC, Cain Velasquez carries a considerable amount of name value. As a relatively new company, this is undoubtedly something that AEW can benefit from
Cain Velasquez's November 2011 UFC heavyweight title fight with Junior Dos Santos drew a peak audience of 8.8 million viewers in the US, demonstrating his ability to bring a broad television audience.
The above figure was helped, in part, by Cain Velasquez's tremendous popularity in Mexico. Aside from the Lucha Brothers, AEW does not have many Hispanic stars. By adding Velasquez to its roster, AEW can instantly broaden its appeal to that market.
In addition, Velasquez's first major angles and matches would likely attract some mainstream sports coverage. Given that AEW Dynamite goes head-to-head with WWE's NXT television show in the Wednesday night ratings, featuring a performer of his stature could do wonders for AEW's brand awareness - helping to increase viewing figures.