Speaking specifically to how the real world characters are going to interact with their avatars, Madison Iseman, who plays the ditzy Bethany, went a bit bigger with the question by noting that determining the base personalities of the in-game heroes – played by Dwayne Johnson, Kevin Hart, Jack Black, Karen Gillan, and Nick Jonas – is going to be a challenge for the sequel, given that we only know how they act when they are taking on the personalities of individuals sucked into the game. It’s an element of Jumanji 4 that very much has her excited:
Article source: https://www.cinemablend.com/news/2492945/what-jumanjis-stars-hope-to-see-in-jumanji-4-with-the-video-game-avatars-possibly-becoming-real