The true origin of... someone.

more the engrish!

When being a child Bruce Wayne had witnessed with his own eyes the fact his parents of millionaire were killed cruelly. So affected his strong desire of Revenging his parents. However, God had never given him a chance to fulfill his will. Following the advice of Raws Al-Ghul - the chief of Ninja Group, Bruce come to Gete, which was a corrupted city filled with various crime groups. Bruce found a basement under his villa that turned him into another person: Spiderman. With this mask Spiderman stroke all criminal activates and criminals everywhere. Such as Tougon, the chief of mafia, Dr. Jackstraw, the abnormal drug trafficker, even a mysterious opponent quite familiar with him

Somehow Batman translated from English back to Engrish becomes Spiderman. I would like to think the translator is a small child who thinks the real synopsis is too boring so he changes some of the details, the way he would like them.