Just as Captain America: Civil War was more than just a solo outing for the character, it appears that Thor: Ragnarok will follow the same framework, and will be more of an ensemble film.
The latest news from the film comes courtesy of JoBlo.com. Their sources indicate the film will be a mashup of the Ragnarok storyline from the comics and the fan favorite Planet Hulk story by Greg Pak. The sources say that the film will definitely have a Planet Hulk element and that Thor will "definitely be involved in some gladiatorial games run by the Grandmaster", who is played by Jeff Goldblum in Ragnarok.
The source also adds that Hulk (played by Mark Ruffalo) will have a costume similar to his look in Planet Hulk, with the more primal accessories and the one-sided armor covering his left arm. No details have been revealed about how either one gets to the planet, but once they get there fans will recognize pieces of both well-regarded storylines. Thor is attempting to find the ultimate weapon to stop Ragnarok and reset the universe, and that takes him in some way to this planet.
Chris Hemsworth's Thor will also have a different look once he's on the planet, evidently sporting a shaved head. Expect a different look for Tessa Thompson's debuting Valkyrie as well, who will be sporting war paint and will skew towards a more primal look as well, as opposed to her comic version's more nordic armor.
Thor Ragnarok is set to release on November 3rd, 2017.