I Have A Portal To Another Worlds IHAPTAW

Sam was an unluckiest person his parents died at age of 10. He was always bullied by everyone in orphanage.
One day he was walking towards the orphanage he died due to a conspiracy made by his girlfriend and his best friend.
When Sam opened his eyes he saw himself room which he was not familiar with.
He found he can move to another worlds such as MARVEL,DC,NARUTO,I Robots,etc...