It may be another case of Marvel simply trying to elate their fans with comic book references, but Dr. Selvig's chalkboard also holds two potentially massive bombshells for the future of the Marvel Cinematic Universe. Let's begin with 'The Fault.'
There may be some movie fans who have yet to hear of 'The Inhumans,' but that is certainly about to change. With Guardians of the Galaxy taking the MCU cosmic, there is a very real chance of seeing 'The Fault' - a tear in the universe with which Nova, Quasar, and the Guardians have tangled - before long.
As for 'The Crossroads,' the concept features heavily in a Dr. Strange story in which the good doctor isolates the Hulk during a particularly fierce rampage. Whether these name drops are planting seeds for the future, or simply reassuring fans that the movies are still priorities for Marvel, only true fans will understand their significance.