->''Our World's about to break,\\
[[ComicBook/IncredibleHulk Tormented and attacked]]\\
[[ComicBook/CaptainAmerica Lost from when we wake]]\\
[[ComicBook/TheMightyThor With no way to go back]]\\
[[ComicBook/IronMan I'm standing on my own...]]\\
But now I'm not alone.\\
Always we will fight as one,\\
Till the battle's...\\
Won with evil on the run,\\
we never come undone.\\
Assemble, we are strong\\
Forever fight as one\\
Assembled we are strong\\
Forever fight as one.''
-->--'''[[http://www.youtube.com/watch?v=WtZ-cz-3zqo Opening]] ThemeTune''' from Season One.

->''[[ComicBook/AntMan Too small to turn the tide]]\\
[[ComicBook/{{Hawkeye}} Too stubborn to give in]]\\
[[ComicBook/BlackPanther Pushed by pain and pride]]\\
[[ComicBook/TheWasp To face these fears and win]]\\
[[ComicBook/SecretInvasion There's no one left to trust]]\\
It all comes down to us\\
-->--'''Unused Lyrics''' for the Season One Theme.

->''And there came a day unlike any other, when Earth's mightiest heroes found themselves united against a common threat. On that day, they became The Avengers! The invincible armored Comicbook/IronMan. [[TheMightyThor Thor]], prince of thunder. [[Comicbook/IncredibleHulk Hulk]], the strongest superhero there is. And, CaptainAmerica, the First Avenger!''
-->--'''OpeningNarration''' from Season Two.[[note]]Ironically, these four guys don't fight anyone together in between the first season finale and episode 48.[[/note]]