-- John Cena is by far WWE's top merchandise seller with AJ Styles and Roman Reigns battling for the second spot. The New Day are also said to be strong sellers and talent like Finn Balor, Seth Rollins and Braun Strowmn also do very well.
-- When considering all the non-main event talent in WWE right now, Vince McMahon remains the most high on Baron Corbin as a future major player. Early advertising for Extreme Rules on 7/15 suggests Corbin will be in the WWE title picture with AJ Styles and Shinsuke Nakamura, which could definitely change but does indicate that it was the plan at some point in the recent past.
Source: Wrestling Observer Newsletter. Subscription information & prices available at f4wonline.com