Oy....
Alright I can't stand watching this crap anymore... There's a LOT that needs to be cleared up in this thread.
First off. We've seen Predator equipment that can handle Alien acid to a fairly decent degree so it's pretty clear that while Aliens can burn (decompose) their way through most substances, they can't burn their way through every substance.
Besides that we know that you can use products like stainless steel in order to contain/transport things like hydrosulfurics. Adamantium treats steel like hot butter.
As someone as already mentioned acids have been used on Wolverine's skeleton already and while his flesh dissolved his skeleton did not.
As someone else mentioned, his bones have been described as unbreakable.. and proven to be against countless types of attacks, strains, and tests. If his skeleton was so easy to dissolve with acid I think it would have been attempted by now.
Second... I've never understood why... and I never will... so many people hear "elder predator" and suddenly become under this trance that whatever they're fighting has no chance of victory. It's hilarious to me.
Elder predators are not gods of combat. They're just competent fighters as well as seasoned hunters.
That's something that has to be accounted for in this thread. Predators are not typically well versed in one on one combat, they're hunters.
Even Shorty who was a bug-hunt vet got his shit kicked in by Machiko a 5 foot 4 100 poun asian girl with a brown belt in unarmed 1on1 combat.
Now while the average predator can overpower, and out muscle your typical human, even your above average humans like dutch or his brother, none of those guys even comes close to being a physical threat to guys like Wolverine, Daredevil, Cap etc.... Even without powers Wolverine has one shot guys who make the Shaefer brothers look tiny by comparison, as DDD said before, he slings them arround like pillows.
When it comes to actually having to fight, Aliens are the cream of the crop for most hunters but even then look at some of their best warriors.
The Elder Broken tusk could take down what 5 or 6 aliens in combat and that was some feat for a predator. Maybe one of the best to date because other seasoned hunters like
Light Stepper (one handed pred) or Wolf (Avpr) couldn't take 1 damned predalien without serious issue in 1on1 combat.
Then you have novelizations and comics that have elders DIE in one on one combat with regular Xeno's...
I mean I guess that taking out Aliens is supposed to be impressive but with Wolverine's powers I'm fairly confident that he would run wild on a number of them before going down. Look at his fight with the N'garai nation. He went to town on their entire brood who are all physically endowed enough to take on guys like Hulk or run through the best the danger room could offer with no resistance at all.
If you look at the best feats a predator can offer in skill, it comes off like a bare minimum of street level riffraff like Night Thrasher, nevermind street kings like Deadpool, or hell even Moonknight.
Finally as for the fight, CIS included, Aliens have a natural hostile response to Predators created by millions of years of evolution. Even though Wolverine is in the area they'll be more naturally inclined to attack the predators.
All that said, IF for some reason in this particular thread CIS doesn't apply to the AVP feud, then the hunters can win this.
All they have to do is sit back and wait for the Xeno's to attack Wolverine, then blast the Xeno's to hell spraying acid all over Wolves. That sets him up for a series of plasma blasts... and if he's still up after that they can end the fight by cutting him down with their nodachis. Luckly for them Predator weaponry is practically designed to deal with Wolverine by bleeding him out which would be fairly easy to do after all the aforementioned damage.
They can win this, but only by playing to their strengths and it isn't because ZOMG ELDERZ R UBER!1!
However, if they for some reason end up caught in a brawl with Wolverine up close, if he uses his senses to counter ambush them (as Aliens have done in the past) and draw them in close quarters, they're all phucked and they will be cut down just like the N'garai were.