Dataminers have been digging into the files for Fall Guys: Ultimate Knockout - the new gun-free battle royale taking the world by storm - and discovered two themed crossover skins: one Portal-related, and the other inspired by My Friend Pedro.
As discovered by Fall Guys leaker HyperxFG, the Aperture-themed skins are thought to go live on 3rd September 2020, while the My Friend Pedro one reportedly releases just a few days later on 6th September. The Portal one, however, is only reported for listed for PC players right now.
Naturally, planned events and collaborations can, and do, change, but that's what's rumoured for now.