What If... Batman was a Saiyan?

The Journey

After realizing his immense power, Bruce went on a quest to learn how to control it. As soon as he was 16 years old, he bought tickets to every continent in search of mentors to help him keep his newfound power in check. He packed his bags and left Gotham behind.

(Time-skip to over 12 years later)

Alfred was busy dusting the house when he heard a knock on the front door. He opened it to see an older and somewhat wiser Bruce. He beamed from ear-to-ear and happily welcomed Bruce back. Now, he may not have looked like much but Bruce had trained intensely and had mastered nearly ever martial art in the world including Muay Thai, Tai Chi, Tae-Kwon do, Karate, Judo, Kickboxing, etc. He had studied with some of the most intelligent men in the world and this allowed him to understand intimidation, tracking, criminology, psychology etc. (Here's a meme to describe the magnitude of his training)

But perhaps most importantly, he had learned to control his rage and activate a so-called 'legendary' transformation. No one on Earth had seen it but they taught him how to control it, he left home a boy and came back a man and now... NOTHING would stop him from ridding the world of the scum that plagued it. However, when learning to temper his rage, his mentors told him that he should show the opposite of what he felt because if he didn't, he'd be just as evil as the people he pledged to end. 

After eating Alfred's very own 'legendary' soup, Bruce felt at home and went outside to train more. He was practicing on the many trees outside of his house. To test his power, he repressed his chi (life force) to about 25% of its maximum and practiced a gut kick to an evergreen tree. It snapped in half and fell to the ground. (if you get this reference, you're officially my favorite person)

He then applied a knifehand strike to the base of a fir tree and watched it crumble to the ground. Satisfied, he went back inside and starting planning the first night of his patrol.

He applied makeup to his face so people wouldn't recognize him as Bruce Wayne and strolled down to the most dangerous part of the entire city... Park Row. As he entered, he looked for scumbags to prey upon. To get a better view of the area, he climbed the building next to him and got to the top within a few seconds. He learned parkour fromBilal Alsselah in France and it looked like it came in handy. (if you understand this reference I love you)

He saw a woman being backed into an alley and he noticed around 6 other thugs harassing her, he decided this would be a good time to test his new skills. He dropped from the building directly onto a man's skull, he felt a few bones get crushed and deduced that the man would most likely have amnesia for the next few years, he grabbed the other and threw him into the other two and they fell over like bowling pins. He then applied a knifehand strike to the man's solar plexus and the man crumpled into a little ball and starting choking. The last one ran off.

He let down his guard and asked the woman if she was okay, she started to nod but her calm face instantly turned to terror as she pointed behind him and started to stutter. The man who was choking a second ago, was sprinting up to Bruce with a knife, he pushed the woman out of the way and in turn got stabbed right in the stomach. 

As warm blood was pouring out of the wound, the man threw him to the ground and starting kicking the knife, driving it deeper into his flesh. But he remembered the promise he had to keep and didn't intend on breaking it. He grabbed the man's foot as it approached him and pushed the scum back. Then as he started to push himself up, the man's expression turned from surprise to terror, "W-What the hell are you?!" he shouted. 

Bruce took the knife out of his stomach and slowly started to progress to the man, as he inched forward, the man inched backwards thinking of the inhuman act being displayed. Bruce proceeded to stab the man in the shoulder and left him for the police. As the man screamed into the night, Bruce limped away unsatisfied. If he was going to protect Gotham he couldn't leave himself open to attacks like that. If he hadn't gone through over 12 years worth of training, he'd be a dead man. 

Bruce called a cab and managed to hide his wound from the driver, when he got to the Manor, he rang the doorbell and right afterwards, he began to feel dizzy and nauseous. When Alfred opened the door he could feel his consciousness slipping from him and fell flat on his face.