The clip also features Elton John performing Stonehenge with the fictional band at their reunion concert, on a piano that rises from underneath the stage.
Speaking in the trailer, McCartney says: "Pink Torpedo, that's literature, really."
The film is a follow-up to This Is Spinal Tap (1984), and follows David St Hubbins (Michael McKean), Nigel Tufnel (Christopher Guest), and Derek Smalls (Harry Shearer) as they reunite after a 15-year hiatus.
In the trailer, introduced by Marty DiBergi (Rob Reiner), the band's members are seen to have launched their own cryptocurrency and worked in a shop during their time apart.
Their reunion is revealed to take place in New Orleans as a replacement for "an evening with Stormy Daniels" which was cancelled at the venue, while a scene showing them going through merchandise for the show sees the band looking at branded Tap Water.
The band are later asked whether one of them would be willing to die during the concert, with one of the members replying: "Would you settle for a coma?"
Spinal Tap II: The End Continues will be released in cinemas on September 12.
The original film followed the band from their beginnings as the skiffle group, The Originals, through to their time as a 1960s R&B group called The Thamesmen who had a hit with Gimme Some Money, before eventually becoming Spinal Tap, which begins as a psychedelic band before moving into heavy metal.
The name Spinal Tap has become a derogatory term to describe bands who overindulge in rock cliches, while the film also gave birth to the phrase "turn it up to 11" after guitarist Nigel's amps were shown to have volume switches that go to 11 rather than 10 in the original movie.
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