"Born To Run" - We know the cast can deliver on this song from the Emmys opening (which was phenomenal), so how hard would it be to refashion it as the opening number for the Springsteen episode?
"No Surrender" - Since we kind of already got to see "Born To Run" at the Emmys, "No Surrender" would make a great alternative opener. The first line of the song, after all, is "We busted out of class, had to get away from those fools." Plus, "these drums and these guitars" are the instruments of choice for leading men Finn and Puck. If they ever make up, this would be a great duet for them.
"Dancing in the Dark" - You can't not include this song in a Springsteen ep. It would make for a great ensemble dance number, or, with lyrics like, "Wanna change my clothes, my hair, my face," it might make an interesting makeover montage, should they be so inclined.
"Hungry Heart" - Artie would kill it. And since Tina left him for Mike Chang's abs, he has reason to lament his hungry heart.
"Glory Days" - What better way for Mr. Schue to reminisce about his own glory days when he was the star of his high school glee club? I can't take credit for this epiphany, however. It was the esteemed Michael Ausiello who suggested it.
"Secret Garden" - This slow anthem from Jerry Maguire has Lea Michelle written all over it.
"Thunder Road" - Once you picture Puck with a guitar belting out the song's famous line, "It's a town full of losers, I'm pulling outta here to wiiiiiiiin!" it's kind of hard to stop imagining it. Puck has always said he has higher ambitions than becoming another Lima loser.
"Jungleland" - The epicness of this song paired with the emotional turmoil of our beloved Glee cast would make a climactic finale to the episode.