There is a way that the future movies can continue without bringing the dead heroes back... I hope this happens because then this movie would be for nothing
Black Panther 2: Shuri becomes Black Panther
Spiderman: Miles Morales becomes Spiderman, already teased in Homecoming
GOTG3: Rocket and Nebula join the Ravagers. What happened to Kraglin? Kraglin too...
Doctor Strange: This one is a problem because the movie is named after the man, and not the hero, or the Sorcerer Supreme. But don't think a sequel is announced anyway.
Highly unlikely. What if the whole movie is one of the future which was foreseen by Strange via the time stone in which they should've won, but failed because of Star lord's sudden actions? The possibilities are endless.
Like that, they won't kill off the characters that easily, as the entire MCU depends on them. Those heroes which were dead, can always be brought back by Time stone, as evident by Thanos rolls back time resurrecting Vision for the mind stone, and then killing him again.
However, the mantle can be passed to others without killing the main character and writing them off like making Bucky/Sam as next captain.
and one more thing "Soul world", which i guess is depicted as the orange world where Thanos meets little Gamora after he wiped 1/2 of earth. In my guess, the heroes are not really dead but they're (ie,. souls) getting trapped inside the Soul stone
(like in the comics.)
