The tag-team action comes home! Wakanda is the battleground - as the Avengers and the FF unite to prevent a Vibranium-powered threat to all life as we know it! A long-lost Avenger returns to active duty - but will that be enough to turn the tide? And in space, interstellar intrigue threatens the fragile Kree/Skrull alliance...and the repercussions might just doom planet Earth! Rated T+