What we know about Avengers: Doomsday is limited, but both Pedro Pascal and RDJ are in the cast. Fans are hyped for Robert Downey Jr's return, and it sounds like he was super welcoming to Mr. Mando himself. In Pascal's words:

According to a new interview, Pascal joined the cast of Avengers: Doomsday at Robert Downey, Jr's house for what Vanity Fair calls a "homework day," presumably involving brushing up on the continuity of the characters, their relationships, and their already established adventures.

And Pascal is also a newfound staple at Downey’s own home, too. Pascal teased to VF that he (and presumably, his fellow “Fantastic Four” co-stars Vanessa Kirby, Ebon Moss-Bachrach, and Joseph Quinn) has been part of the “‘Avengers’ cast ‘homework’ day,” hosted by Downey, as VF reported.