I'm not sure if I'm conflating the marvel character with the mythological beast or not here, so someone remind me: does killing the Marvel Wendigo transfer the curse to you and make you the new Wendigo or not?
If so, it's not really a character who can be killed, especially by our heroes.
Not that I know of. But if one person becomes the Wendigo (by engaging in cannibalism in the Canadian woods), that would automatically cure the previous host of the Wendigo.
I hope that either in a new Hulk film, or even in She-Hulk (but preferably a Hulk film) they have a flashback to Hulk's origins. I would honestly like them to retcon his origin to something closer to the comics. I don't really want the dentist's chair taken from the TV series or the Hulk simply being a version of the Super Soldier Serum experiment.
I'd prefer a Gamma Bomb explosion and his origin connected to nuclear testing. I thought the comic origin was much better, because he didn't just bring it on himself but it was a heroic act to save Rick Jones. And also it has a Cold War feel with allusions to the atomic age, and even makes him a bit similar to a monster like Godzilla who was born out of nuclear testing (or at least awakened by that). Also, the Gamma Bomb explosion looks so much more dramatic than sitting in the dentist's chair (although the way they did it with the spooky music on the TV series did ramp up the tension).
Although people don't do atomic testing anymore, and had stopped even by the 1970s (the time of the TV series), it could've been a once-off experiment. It would be similar to how Carol Danvers got her powers in the Captain Marvel movie where she absorbed the blast of that explosion, or even similar to the Particle Accelerator exploding in The Flash TV show.
So I would welcome a retcon, even if it wipes out part of the Incredible Hulk continuity from the MCU. And in fact, it doesn't even have to wipe that out of continuity. We only assume that Banner became the Hulk from that opening sequence in the credits. But if you watch carefully, who is to say that he wasn't already the Hulk before he sat in the chair?
The dentist's chair could've simply been one of his experiments to try to cure himself of the Hulk but it exacerbated the problem further. He could already have received his powers from that massive dose of Gamma Rays when the Gamma Bomb went off. Banner was often trying different experiments to cure himself and they didn't always work. This could've just been one of them and wouldn't contradict things if retconned.
After all, Marvel retconned the ending of TIH with Tony Stark so that it was interpreted differently to the way it was first presented in the end credits.