This Bones fangirls' finale theory

I've listened, I've read, I've had a chat with @forensicmama but here's my only theory based on the conference call and the following articles released.

Max is back and as they both said... him never being an onlooker via Screenrant's article

On Max returning for the Gravedigger trial:

HH: I would say that he’s not just there for moral support. How’s that Emily?

ED: Yeah, I think that’s accurate.

HH: It’s a bit more than that. He’s a mysterious, multifaceted, character. He’s not an on-looker, at heart.

ED: No, never an on-looker.

HH: Boy, I don’t want to say anymore than that.

The Gravedigger story is still open

HH: What do you think Emily? I don’t think there’s a lot of closure.

ED: No, there isn’t a lot of closure. Maybe the Gravedigger, there’s some closure there.

HH: Yes, there’s some closure and some not closure. Closure is not the word I would use as we barrel into season six. What do you think, Emily?

ED: [jokingly] Agreed. I think it’s over-rated. We don’t need closure. [laughs] We’ve got a whole other season, at least, to go.

Summed up into 3 sentences

Maybe... just maybe, the Gravedigger is killed at the end of the finale. Max is the culprit -> committed the crime to protect Brennan, Booth and the other squints from future harm/torment and somehow Brennan sets herself up to protect Max from going back to jail. That or the same theory about the Gravedigger being killed and Brennan is the main suspect. Ends with Booth coming to arrest Brennan at the end of the finale = cliffhanger.

©2010 Fox Broadcasting Co. Cr: Greg Gayne/FOX

They are serious. I'm more serious about them getting together after 6 years. Angst = bad for health

And then they run away, get married, have babies and live happily ever after.

Okay, the last sentence was my thoughts running away from me but how outrageously cool would that theory be?