You can gain one guaranteed Peely Pak every week from a Temporal Archimedea run that reaches the 15 Research Point threshold. The other source of Peely Pak is Kaya Valesco's vendor inventory.

but we do know what from the game they're going to be themed after - Peely and the Battle Bus. The two things that are unmistakably Fortnite seven years into the game's unmatched run, so much so ...