Titus apprehends the Guardians of the Galaxy when they try to infiltrate the Nova Corps Headquarters on Xandar even after preventing Supergiant from escaping from her prison and preventing a spaceship from crashing. As part of a deal with Titus, the Guardians infiltrate a notorious gang of weapons dealers called the Black Order (the same group that Supergiant works for which also consists of Ebony Maw, Proxima Midnight, Corvus Glaive, and Black Dwarf) who have been sighted on the desert planet of Eilsel 4. The Black Order plans to obtain the Universal Weapon that was previously used by Ronan the Accuser and give it to Thanos.
Quill's reference to "Can't Touch This," as the song was released in 1990, but Peter was abducted in 1988. His knowledge of Earth music, as implied in the film, is limited to what he heard growing up, prior to his abduction.