TJ has submitted a few spoilers on his website, tjthyne.com and here they are (take them how you might):
1) In Season II, someone came into Jack's life. That individual affected him greatly, and is coming back. Soon. So that may have a bearing on J/A.
2) Apparently Jack is going to be written (finally) reacting against the way Angela is treating him. .
3) This is just general, but is a bit of a shocker; Someone in the Lab is going to need the rest of the team to step up in order to keep them alive!
--Just my assumptions, like I said, you can take them how you wish: Hodgela won't last, even after Cinderella. HH already said that it wouldn't be easy for them. So who is this person from Season II? Clarissa, perhaps? His ex-fiance? Hmmm...
Sounds good that Jack will get some balls and tell Angela that she treats him like crap sometimes.
And that third spoiler sounds an awful lot like The Hero in the Hold. Booth needing the rest of the team to step up and help him out!
Edit: digapony brought up a good point. The person that will come back in Hodgins' life sounds a lot more like The Gravedigger. From the Hero in the Hold sides, it sounded like Jack was deeply and negatively affected by his buried alive experience. I wonder how this will effect Hodgela?