There are some 29 short stories and albums in the Valérian and Laureline series. Which does the film Valerian and the City of a Thousand Planets take elements from?
There a lot of... guest appearances :)
This article identifies some of them, e.g. Kistna from On the Frontiers (#13), the Marmaka from Ambassador of the Shadows (#6) and so on.
"Besson has confirmed that the movie will loosely be based on the sixth volume of the comic, Ambassador of the Shadows, first released in 1975"