Place it at the reveal in a crossover edit, just before the gameplay starts, then follow it with the Oh My God Bro Hell Nah reaction for extra disbelief and finish with And His Name Is John Cena for a second surprise entrance.
About this sound
This 6-second voice clip has Peter Griffin reacting in disbelief to Donald Trump, then a cheerful voice welcoming Peter into Fortnite. The sudden switch from shock to a casual greeting feels funny and absurd, like a cartoon character wandering into a battle royale lobby. It is a fan-made mashup made for reaction edits, rather than a moment from one Family Guy episode.