5. Brock Lesnar
The timing was just never right for Batista and Brock Lesnar. When Lesnar was hitting his peak in WWE (2003-2004), Batista was a young rookie being recruited by Ric Flair for the Evolution stable. When Batista became one of the top stars in the company (2005-2010), Lesnar was gone, making waves in the UFC. With both men now established veterans, and under WWE contracts, the time is finally right for these two mega stars to lock horns. This dream match would fit perfectly on a big pay per view like Wrestlemania or Summerslam. Not only would you have the former UFC champion against one of the biggest WWE stars of all time, you would also have Paul Heyman--one of the most genius minds in the business, and manager of Lesnar--promoting it. The end result would be fantastic, and would make the WWE a lot of money.