The film that has been released recently is an adaptation of the French comic series. The comic series was already present here, so we have the tag valerian-and-laureline.
Our existing convention states we need a different tag for adaptations; most recent example I can think of is The Expanse novels and the TV series.
However, the full name of the film will not fit into the 25 character limit (until we get an extension, which seems to be an experiment on other sites now). Which tag should we use for the film? (e.g. valerian-and-the-city, valerian-2017, etc.) Please keep in mind that the tag should be easy to autocomplete (so that it's easy to find), and fit into the character limit, while at the same time looking sane (preferably without awkward abbreviations).