Um...there's a huge difference between Dave Batista and Ken Kennedy.
First of all, Batista is a company man...through and through. Next to Cena, it seems that he would do pretty much anything for the business, and he WILL be working in the business long after he retires from the ring. Ken Kennedy...well...I have no opinion of him regarding this.
Second of all, he's a many-time world champion. Kennedy...he won MITB and then lost it to Edge because they didn't think he was championship material.
Thirdly, Batista came back from injury he suffered around Christmas and provided a solid two months of main-event action before he got hurt again. Kennedy was back for one night after being gone for a year, and then he hurt himself again.
Fourthly, he's friends with Trips. I have no idea if Kennedy is friends with Trips or not...but since he got released, my guess is no.
Fifthly, well...I could go on forever.
BOTTOM LINE: It's Batista and Kennedy we are talking about here. They are at two completely different levels, with Batista being at the top.