#2 Should be - AJ Styles
Batista has been away from the ring for a long time, which might have undoubtedly generated ring rust. He needs someone who could make him look like gold in the ring, and there's no one on the planet who can do the job better than The Phenomenal AJ Styles.
The reigning WWE Champion has completed a year as the blue brand's top champion, defeating almost every superstar in his year long reign.
Imagine Batista emerging on a random episode of SD Live and throwing an open challenge to the WWE Champion for a title match at WM 35. Surely, this match would even keep the IWC guessing, as AJ has been the company's top guy ever since joining, while the erstwhile Evolution member is a homegrown talent of the product.
AJ Styles could even have a good match with a broom, but having Batista as his opponent at WM 35 would surely blow the arena's roof down.