Spn & The Boys: When Two Worlds Collide

In Season 15 of Supernatural and Season 5 of The Boys - Chuck is left with only two more worlds, and decides to have some fun. One world is Y/n, Sam, Dean and Cas’ world, the original world. The other is ‘The Boys’ world, with Soldier Boy, Mister Marathon and Malchemical. To get the Winchesters off his back for a bit, Chuck transports Y/n, Sam, Dean and Cas (along with previous cooperatives Jack Kline, Lucifer, Gabriel, and Crowley) into ‘The Boys’ world to help Butcher and his team in the fight against Homelander. In other words, the crossover where Chuck finally starts moving his toys between his different play sets.