#3 He may be saved for the US Title scene
There's a lot of fire power already in the WWE Championship picture right now. On the other hand, R-Truth is one of those Champions who did not even make the show only a week after he won the title.
To spruce up the title scene, WWE may be saving two of its best guns - Rey Mysterio and Andrade. Both men could put on exciting matches and elevate the status of the mid-card Championship and have it become meaningful once again.
One wonders if the newly formed duo of Rusev and Shinsuke Nakamura will be the team that guns for the United States Championship. However, it doesn't make sense for them to team up to go after a singles title at all.
The addition of Andrade and Mysterio could really strengthen the US Title picture.