That's according to a listing found on Amazon, which specifies a May 7 release date.
The product description bills the re-release as the "Ultimate Deus Ex: Human Revolution experience", featuring a "multitude of improvements, features and additional content".
The Wii U versions will supposedly include a new augmentation for Adam Jensen called the 'Neural Hub'. Though the listing doesn't provide any particulars on the new ability, it does confirm it will use the GamePad prominently.
Deus Ex: Human Revolution developer Eidos Montreal recently contributed to the development of Tomb Raider, and confirmed that it's working on Thief 4 for next-gen consoles and PC.