If you're like us, you had no idea what was happening in ABC's 'Once Upon A Time' season finale, but the incredible 'Agents of S.H.I.E.L.D.' trailer was finally unleashed tonight! Debuting on ABC this fall with a pilot directed by 'The Avengers' guru Joss Whedon himself, the new promo for Marvel's 'Agents of S.H.I.E.L.D.' definitely proved that Coulson lives, gave us a glimpse of our favorite Avengers and teased some exciting new heroes as well! Watch for yourself inside!