Ray is called "Boy Scout" by Captain Cold. A nickname for Superman is "the Big Blue Boy Scout." Routh previously played Superman in Superman Returns (2006).
The location where Palmer meets up with Vostok is meant to be the Bolshoi Theater in Moscow (built in 1825), where the world-famous Bolshoi Ballet company is based.
Shares its title with the 1985 film White Knights starring Mikhail Baryshnikov and Gregory Hines.
When Firestorm escapes the Pentagon (through the roof) Rip demands that he picks up the winged avenger. He meants Kendra aka Hawkgirl. However the term Avenger could also be a reference to the Marvel Universe, namely The Avengers, which has Hawkeye (reference by name) and/or "Falcon" (Reference by suit. Falcon has wings).