They might have an epic battle to test Luffy's growth. Shanks could see how much stronger Luffy has become and be proud. Maybe Luffy will show off his new Haki abilities.
Luffy might be more confident and less like a little kid around Shanks. He has grown a lot, and Shanks would notice this. Their relationship could become more of an equal partnership in terms of respect.
😋I highly recommend One Piece: Replicating Talent from Elbaf to you! This light novel was about a transmigrator in the world of Luffy, Sauron, Ace, and Shanks. Although it was a Doujinshi novel, the plot was very attractive, especially the interaction between the male and female protagonists and the setting of the copying talent. I hope you like this fairy's recommendation. Muah ~😗
As of now, Uta is indeed alive. The story hasn't depicted anything otherwise. Maybe there'll be changes in the future, but for now, Uta's part in the manga continues with them being alive.
The "Negative Fruit" in One Piece was one of the superpowers that Luffy encountered for the first time in the story. The scene where Luffy and his gang fought against the "Negative Fruit" appeared in episode 598,"Luffy and Luffy!" Adventures in Two Worlds.