Although Avengers star Mark Ruffalo has told fans they shouldn't expect a Hulk solo film anytime soon, he has indicated that there's going to be major changes for the character that will culminate in Avengers: Infinity War's as-yet-untitled sequel."There's a huge change for Hulk and for Banner, and it isn't resolved in the first Infinity War," Ruffalo told Fandango at the D23 Expo in Anaheim, California. "It sort of culminates into the second Infinity War."“We can't tell because we don’t know. We haven't read it," War Machine actor Don Cheadle said, before Ruffalo added, "But there's a lot of surprises."RELATED: Avengers: Infinity War's Thanos Fully Revealed in D23 Expo PhotoRuffalo also revealed that audiences will start to see those changes as early as Thor: Ragnarok, which hits theaters this November. According to him, "Thor 3 is the beginning of a lot of changes for Banner and Hulk."

While it's not yet clear what those changes might entail, it may be related to the God of Thunder's visit to the colosseum on the planet Sakaar and the confrontation between the two as teased in the film's first trailer.

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In theaters Nov. 3, director Taika Waititi's Thor: Ragnarok stars Chris Hemsworth as Thor, Tom Hiddleston as Loki, Cate Blanchett as Hela, Idris Elba as Heimdall, Jeff Goldblum as Grandmaster, Tessa Thompson as Valkyrie, Karl Urban as Skurge, Mark Ruffalo as Bruce Banner/the Hulk and Anthony Hopkins as Odin.

Directed by Joe and Anthony Russo, Avengers: Infinity War boasts a sprawling ensemble cast that includes Robert Downey Jr., Josh Brolin, Mark Ruffalo, Tom Hiddleston, Chris Evans, Chris Hemsworth, Jeremy Renner, Chris Pratt, Elizabeth Olsen, Sebastian Stan, Benedict Cumberbatch, Paul Bettany, Samuel L. Jackson, Cobie Smulders, Benedict Wong, Zoe Saldana, Karen Gillan, Vin Diesel, Dave Bautista, Pom Klementieff, Scarlett Johansson, Tom Holland and Anthony Mackie. The film arrives in theaters May 4, 2018, with the untitled sequel opening May 3, 2019.

(via ComicBook.com)