According to Nicky Romero's Twitter, the two are in the studio together. We don't know what it means yet, but maybe a collaboration? Maybe they're remixing each other? Maybe it's just a couple of Dutchmen trading studio tricks?
— Nicky Romero (@nickyromero) May 7, 2013
Romero tweeted again in Dutch:
@djheadhunterz ik ben bezig met het lijstje van 8 melodietjes die Headhunterz goed kan naspelen
— Nicky Romero (@nickyromero) May 8, 2013
The tweet roughly translates to "I'm working on the list of 8 melodies that Headhunterz can reenact good." Headhunterz' follow-up tweets suggests a joking and playful camaraderie between the two, suggesting in Dutch that "I'm going to make a list of eight other surnames Nicky Romero could have chosen."
@nickyromero Ik ga een lijstje maken met 8 andere achternamen die Nicky Romero had kunnen kiezen.
— Headhunterz (@djheadhunterz) May 8, 2013