According to sources within WWE, the Fandango concussion is indeed real, and is not part of a story line despite being reported by WWE.com.
Fandango suffered the concussion at last week's Smackdown tapings and as of this writing there is no time table on his return.
As we reported last week, WWE is taking concussions and concussion symptoms very seriously following Dolph Ziggler's recent injury, so although Fandango passed his impact testing, WWE is likely being extra cautious.