"If Wolvie gets onto Hulk's back, Hulk's done for. Although Wolvie has been ripped in half by Banner, Wolverine could probably beat him in a standard fight."
He can't, he could beat Classic Hulk but current Hulk no way, there is a reason why Hulk no longer fights Wolverine, the writers can't find a reasonable way for Wolverine to win. The Hulk has strength, durability and stamina advantage over Wolverine, why would Wolverine need She-Hulk's help defeating Wendigo is he's as tough as you say and The Hulk beats Wendigo all the time in fact there has been a comic book in which he fights multiple Wendigos and if that was Wolverine he would have gotten slaughtered. This isn't a curbstomp but there is no way Wolverine can win, he'll only piss The Hulk off and get the hell beat out of him, if it's a fight to the death well then The Hulk could win, remember Wolverine can die but his healing factor will regenerate him that's all so The Hulk could just slaughter Wolverine until he's dead but he would regenerate and there is no way Wolverine will win, if a helicopter firing thousands of sharp adamentium needles weren't enough to kill the Hulk, Wolverine is not doing it. It's the same thing with Abomination, Abomination used to manhandle The Hulk but currently he couldn't handle She-Hulk and was easily defeated, Hercules also defeated Abomination with a single strike a few years back. The Hulk that ripped Wolverine in half isn't the 616 mainstream Hulk it was in an alternate universe.