Earlier this week, Thor: Ragnarok star Tessa Thompson took to Twitter to respond to a thread that began with complaints of changes to Valkyrie's costume and race in the film:
The Tweet was favorited by Taika Waititi, who also portrays Korg in the film, and who was in a relationship with fellow Warbound member Hiroim in the comics. Loki is also portrayed as an LGBT character, being both pansexual (like another Marvel character, Deadpool) and able to change gender at wil.
The actress's willingness to state this publicly means it is possible that Valkyrie's sexuality will actually be addressed in the movie.