Despite being out of the WWE by the time the game was published, Jeff Hardy still makes a small appearance in-game. In Road to Wrestlemania, go to Locker Room A (the left one). Go in the door and turn right. You should see an action figure poster. One of the action figures is Jeff Hardy.
As all of you know, you can't defend your titles in Exhibition Mode. But I figured out a way.
All you have to do is make the Superstar you want to defend the title hold two titles at once. For example, Randy Orton is the WWE Champion and you want to defend his title against Edge. So go to My WWE, and then Superstar Management, and make Randy Orton hold the Intercontinental Championship too. So, when you select him at the Selection Screen, you will see an option to put the title on the line. Simple as that!