Orochimaru...
"Oh, how good it felt to gain new found knowledge in a strange, new land. So when Brainiac teleported me to his ship in his universe, it was like being a kid in a candy shop with all the captured cities aboard and the various types of technology that the Coluan had.
I'll admit, he was quite the challenge for me even with my various jutsu at my disposal as well as my taijutsu prowess and adapting intellect, I even summoned Manda at one point to once the battle took place down on the Earth below us.
As the fight dragged on, I planted the Curse Mark: Seal on the alien's neck just in case he destroys my current body or if my plan to devour him had failed. Luckily, I did managed to do the latter after I transformed into my white snake state and ate him alive!
As I enveloped the Coluan's mind and my soul began to dominate the body, my previous body fell apart. Not that I needed anyway.
At last, his body was mind!
With the invasion over, I was about to make Manda retreat and head to the ship when I saw some of the Earth's protectors standing behind me, ready for a fight.
I told them who was I and that I refused to fight them, however I would help them restore their cities on the condition that I would leave Earth afterwards.
It's very ironic, don't you think? Someone like me, having once experimented on several ninja, drove Sasuke down the dark path by using his thirst for revenge to do so, and killed my former sensei, is now actively doing his part to SAVE lives.
It's funny how of mysterious life seems to work sometimes."