Gunn has said that he hasn’t seen anyone mention the mysterious easter egg, and he’s assured fans many times that it does exist- even going so far as to offer his own money should he be proven wrong.
The director has gone back and forth on if he’ll ever reveal the egg but at least this Guardians 2 one will be easier to find.
The first Guardians is notorious for having one that is still unfound almost three years later, in addition the myriad which had already been discovered.
James Gunn knows a thing or two about easter eggs.