I found that there is a funny easter egg that has not been mentioned by everyone above, so let me mention it! (It's probably because no one listens to the music with subtitles)
The subtitles scroll to the end of the third ending song, followed by a short (about half a minute) Acapella opera. This grand opera is sung like this: you can t stop him, he sa Juggernaut, you can t stop this motherfucker!!! !holy-shithole!holy-shit hole! ho-ho-ly shit hole!ho-ho-ho-ly shithole! holy shit!
This solemn and solemn "opera" is over and then Deadpool is holding Hitler and can’t get down to find the cable come back
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