Timeline… 20 years after Voyager
Storyline… Admiral Chakotay gets that tour of Species 8472 homeworld promised by alien Cmdr. Valerie Archer in episode “In the flesh” and Species 8472 forges new alliance with Federation to defend both of their universes from common enemy. New dark matter based species that threatens both our universes by changing the very nature of life and existance in our universes. Eventually Klingons and Romulans indulge their paranoia and jeopardise alliance’s 1st line of defence.