Many fans believe that Scott Lang could meet a grim fate in Ant-Man and the Wasp: Quantumania, largely due to his history in Marvel Comics.
The Marvel Universe and comics as a whole have shown that death is more than one stage of the life cycle that isn't set in stone. As a result, heroes and villains have died and returned countless times, with a few exceptions, like Uncle Ben and Gwen Stacy. However, many heroes have been killed in tragic ways and returned in equally glorious fashion. But in the moment of their death, there is always a lasting effect, like the death of Superman or Wolverine. Even the live-action world of comic book properties has toyed with the idea of death and resurrection, too.
Ant-Man and the Wasp: Quantumania will follow Scott Lang's journey through the Quantum Realm and the aftermath of encountering a dangerous foe like Kang the Conqueror. But the trailer made fans think that Scott's end might be closer than expected because he could die trying to save his family. But this potential death wouldn't be outlawed as Scott had made the ultimate sacrifice before.
Scott Lang died and returned before!
While Scott was killed in action, his daughter, Cassie, continued her legacy as a hero named Stator. During her time in the Young Avengers, she saved countless lives and learned about the likes of a Kang variant named Iron Lad and the reincarnations of Wanda's children, Wiccan and Speed. But during the Young Avengers: Children's Crusade series (created by Alan Heinberg and Jim Cheung), Iron Lad created technology that allowed the team to influence time without changing it. They used it to prevent Wanda's attack, which meant taking Scott out of time and effectively reviving him. Since then, Scott has remained a staple in the Marvel Universe.
Why is Scott Lang important to both universes?
If Scott dies in the MCU, his death won't come as a surprise to veteran comic book fans. But because of this, his resurrection could be entirely plausible, thanks to recent events in the universe. For example, the Scarlet Witch was recently shown to have suffered a similar fracture as a result of the Darkhold's effect and sacrificed herself for the greater good. But since a body was never found, she likely remained undecided. If so, this could mean that her big return, combined with Kang's time-traveling schemes, could provide the ingredients to bring Scott back, whether through magic or time travel. Logically speaking, this might be the best way to bring Scott back, but narratively speaking, a resurrection of this kind fits in with Scott's core values.
What has made Scott such an invaluable member of the Marvel Universe, both in the movies and the comics, is his ability to sacrifice himself for the people he cares about and the greater good? More importantly, he would have no problem putting himself in danger to protect his daughter. This, more than anyone else, makes him the perfect hero, as Scott knows the value of protecting the innocent and loved ones. He would even do the same thing without powers or a second thought. His death could come as a result, and it would likely be heartbreaking, but the MCU is in a perfect position to bring Scott back, not because he has to, but because he's a good soul who deserves a chance as long as he remains a good person at heart.