Seeing damselflies in the swamps episode of #PrehistoricPlanet2 makes me think, arthropods are so often depicted as sort of unchanging background detail, when their story is far longer and grander than any vertebrates'.
I would love to see arthropod evolution get the #PrehistoricPlanet treatment—although maybe things are too speculative for a narrative treatment.
The alien Cambrian sea, the journeys onto (and off of) land, the heady atmosphere of the Carboniferous, the great flowering of, well, flowers, and all the ecological possibilities that opened up, and of course the obligatory depressing last chapter on contemporary land arthropod declines.
Some key evolutionary developments that would be covered: wings, metamorphosis, eusociality, venom, spider silk (and webs! Aerial capture webs are a surprisingly late arrival), eyes and other sensory organs, sex (e. g. extreme sexual size dimorphism, parthenogenesis, thelytoky/arrhenotoky, all the weird shit mites get up to), parasitism.