Peter Serafinowicz doesn't confirm nor deny Nova Corps' involvement in Avengers: Endgame. The movie could feature some new heroes in the form of the Nova Corps. He and his comrades helped Peter Quill and his ragtag team of heroes defend Xandar from … Short answer: The Nova Corps did not make it into the movie.
After your fourth or fifth re-watch (or beyond), pause the Endgame trailer at the 0:40 mark. The final battle against Thanos called for nearly every living Marvel hero introduced in … Long answer: in Guardians of the Galaxy, they changed the nature of the Nova Corps which effectively wrote out a Nova Superhero. Debuting in James Gunn's Guardians of the Galaxy, the actor played Garthan Saal - a member of the intergalactic military and police force of the Nova Empire headed by Glenn Close's Nova Prime. Thanos’ ship is the noteworthy scene-stealer alone, but there’s a lot going on in the same plane … "Avengers: Endgame" fans were led to believe, by the Russo Brothers, that Richard Rider's Nova was in the huge battle scene at the end of the movie. Avengers: Endgame was packed with more Marvel characters than anyone may have realized.