The NHL didn't give out a lifetime ban for Bertuzzi, so I doubt they will for Thornton.
I think it's kind of sick the way the Bruins have been going out of their way to make it seem like Thornton is just some nice guy that made a minor mistake while the Penguins are all so evil since then. They're clearly trying to influence the suspensions doled out. Or am I the only one who noticed that while teams normally don't normally state how a player got injured, the Bruins put out that Chris Kelly's ankle was broken by "a slash from the Penguins' Pascal Dupuis" into their press release. Nevermind the fact that on that play Kelly was hacking, whacking and cross-checking Dupuis, while Dupuis was trying to play the puck, and hit Kelly's foot in the process.
Oh, and let's also ignore that not only was Marchand back in the game after that devastating Neal hit, but Marchand was throwing sticks into the faces of Pens away from the puck the entire rest of the game. He only got called for it once, though.
Neal should get something like 3-5 games, based on how easy it is to determine intent.
With Thornton, there's no question of intent. He should get 20+. But my guess is that they'll hide behind his lack of suspension history and he'll end up with no more than 10, thanks to all of the campaigning the Bruins are doing to make it seem like the Pens "deserved" to have Orpik injured.
I'm just so sick of the Bruins. They are such quintessential schoolyard bullies. They constantly hack and whack with their sticks, they run goalies, they take shots at people after the whistle, and they injure more than their fair share of opposing players (the Pens have lost at least one player to injury per season against the Bruins dating back at least to Mark Eaton's leg being broken in the 07/08 season), but if anyone doesn't just fold to them, they whine and cry about how dirty the other team is.
Try to fight? They send an experienced fighter to pummel your guy, and then laugh about how you're trying to out-physical them.
Try to hit them? They cry and whine about how dirty you are, and then do such things as Chara on Pacioretty and Thornton on Orpik.
Try to skate away and ignore them? Same as if you hit them, only add in how you aren't "following the code" (again, see: Thornton on Orpik).
If I were to follow the typical Bruins' backers modus operandi, then the blame shouldn't be on Neal for his hit to Marchand's head - it would be on Marchand for diving to the ice and staying there after Crosby tripped him (oh wait, following the same MO, I'd have to say that Marchand tripped himself, too). After all, he should have "manned up" and not laid down on the ice for so long! Obviously, that's ridiculous, but that's the same logic as saying that Orpik is somehow at fault for Thornton assaulting him from behind.