"Milo isn't coming back for certain, that's just speculation."
Fanforum.com had this little blurb:
"Alexis spoke at her high school and someone asked her if Jess was returning to GG this season and she said yes. I guess they were having a centennial celebration at her high school in Houston and she spoke at career day on how she became an actress. This is great news. I know that Daniel Palladino said that he would be back, but this just confirms it."
Make your own conclusions, but AS-P has repeatedly said that she would write Jess into an episode in a heartbeat, so if he agreed to do an episode, he'll surely be in one.
"A little rebellion, now and then, is a good thing." - Thomas Jefferson