Well, if he is gone, I hope Danny has a plan on how to replace him.
For all of his supposed faults, if he leaves we will need an experienced sub for Kevin Garnett - not someone that KG will have to spend time teaching. We have perhaps one more shot next year and we need to throw our best team out there.
I think Glen Davis needs to be a part of that team next year.
If he is gone, who will replace him, on the cheap, that's out there right now? I'm not one for any player holding a franchise hostage and expecting more than what they may be worth, but seriously if Glen "Big Baby" Davis leaves who can realistically be had to fill the void behind KG?
To me, all it sounds like is Glen just needs some mental tuning.
If he is gone it will be very interesting to see who Danny brings in to replace him and gel with KG and the rest of the team, because this guy replacing Glen will have to hit the deckplates running. I think the guy backing up KG will be the most important player on the Celtic's roster next year, and I hope it's Glen Davis.
you make it sound like we're doomed without BBD. the guy backing up KG is not the most important player. It's KG. then Rondo. then Pierce and Allen. If we sat down and thought hard about it, i'm sure people here could come up with a list of guys who can fill BBD's role. Plus, that guy will likely not be the ballhog that BBD is! 
What's important though is that whoever they get is signed/traded before training camp starts. A lot of chemistry is built in training camp. This is also partly why I'm so confident in Jeff Green's performance making a big leap from last year's lackluster showing.
Lilrip -
Lord I hope your optimism is well-placed here.
All I know is that KG had that one 28-pt game in May, and then seemed to struggle vs MIA - because Glen's head was evidently not in the game.
By all accounts, he should've been able to abuse Joel Anthony in every game. But he was tired, apparently.
I'm holding out hope that, like you stated, Glen Davis is not that important to this Celtics Team.
I hope this player that you believe is out there is willing to come in here and spell KG, be a good soldier, set picks for Ray, and play good defense - all for a respectable amount of money.
There have been a few out there, indeed, that I think can fill this role, but as we've seen with some of our recent departures (Perk, TA,) I hope that in the event of Glen moving on we won't have an void.