According to F4WOnline.com (via wrestlezone.com), Batista is reportedly upset over money and pay in WWE.

As previously reported, the original plan was for Batista to face Daniel Bryan at WWE Payback in June, which Batista allegedly turned down. The report says that Batista is frustrated that financially, things are panning out differently than what he was told when he agreed to return to WWE. Word is that the money is "not great" right now, and when you have the kind of money Batista has, it makes it that much easier to walk away from WWE. Others are said to be upset, but do not have the option to walk away like Batista or CM Punk.

Batista was scheduled to take the time off later in June, but with the issues, he decided to take an earlier break from the company. WWE officials spent most of Sunday trying to convince Batista to work the Payback PPV, but the latest is that it doesn't look good for him to stick around for that show.

Read more at http://www.411mania.com/wrestling/news/321741/Batista-Reportedly-Upset-With-WWE-Over-Money-Issues.htm#Zlt4Iu4syDdwfwUl.99

Guess we'll soon see if this is true or not.

Wow, if it's not just him that's worrying about this then WWE should really do something.