I think it would be a no go even if the BH200 could handle 3D. I say that because the updates are pretty much non-existant for this player as it already is. I just don't see LG investing a lot of money on continued development of their older players. LG is not the only one doing this, on the other hand some of the manufactures have shown wonderful support for their older players.
It will be interesting to see how many older players get the upgrade. Glad I have a PS3, I won't have to wonder if any of my other BD players will get the upgrade.
They've done studies, you know. 60% of the time it works, every time.