Ass Pull: The final episode can come off as this. After building up to a dramatic showdown with Dark Surfer, he's defeated and then shown to be Disc One Final Boss. The heroes find Dr. Doom, having claimed the Infinity Sword/Stones, and the Squad fight him...only for the stoned to shatter and conveniently restore everything to normal.
Ear Worm: Who'll save the day....Super Hero Squad! Even if naysayers hate the show, they can't deny that the opening theme is catchy. It helps that the composer of the song is Perry Gripp, of Nerf Herder fame.
Plus it sounds a bit like an Offspring song, complete with the singer sounding like Dexter Holland in the verses.
Foe Yay: Enchantress and Thor, though completely one-sided.
Fridge Brilliance: At one point, most of the squad has to either serve jail time or pay an enormous fine. Everyone is shown in jail, except for Iron Man who, as one of the richest men in the Marvel universe, could pay his fine with ease.
Of course, all his metal was melting... You probably don't want to think too hard about that.
Too late. Ow. Ow!
They Just Didn't Care: The animation for the show was pretty lacking. Often times just lingering on a shot with awkward pauses as the characters talked. Reusing footage and using speeded up editing which really didn't help it.