For many people, Tessa Thompson's Valkyrie character was one of the most entertaining things about 2017's "Thor: Ragnarok." As a result, it's only fitting that the "Creed" star is returning to the MCU in Taika Waititi's upcoming sequel, "Thor: Love and Thunder," which — according to Waititi — has Valkyrie's most frustrating foe to date: boredom.