Jorma Taccone is the director of the MacGruber movie, who learned from Anne Hatheway that Nolan would recite lines verbatim from MacGruber on the sets of The Dark Knight Rises.
Christopher Nolan is possibly Hollywood’s biggest filmmaker known for making ultra-serious and complicated blockbusters.
In a recent interview, Taccone revealed his shock at finding out this piece of news, and his subsequent meeting with Nolan.
So it makes sense that Taccone’s first impulse would be to prank the audience with the implication that Nolan had directed the MacGruber sequel.