The previous Dragon Ball Super: Broly movie was set just after the events of the Tournament of Power and prior to Moro appearing in the Dragon Ball Super manga. This is despite the fact that Moro had already been introduced during the release of the previous film. We thus far do not know when the Dragon Ball Super: Super Hero movie is set but we have a pretty good idea.
A serious possibility of the films setting is in-between the events of Moro’s demise and the arrival of Granola in Dragon Ball Super. Why is this most likely? Well, that’s because it’s unlikely that the Granola arc will be finished in the manga, by the time the movie is released.
The Dragon Ball Super manga is released monthly, which makes new content production slow. It also means that arcs drag out and with 2022 less than 5 months away. And with the Granola arc only really just beginning, it’s likely that we won’t see its conclusion until the end of 2022 at the earliest.
As a result, we should assume that the film is cast during the training period of Vegeta and Goku, where Goku improves on Ultra Instinct with Whis and Vegeta learns his new God powers from Beerus. It could mean that we might even see a glimpse of Vegeta’s Super Saiyan Purple transformation using Destruction Haki in the film as well.
Thus far though, we don’t know enough to guarantee that this setting will be the case but it is highly likely. Just like with Dragon Ball Super: Broly, it’s unlikely that the Dragon Ball Super: Super Hero movie will animate something after the events of the manga, while the Dragon Ball Super manga arc is yet to be completed.