Why Am I in Douluo When I Should Be in Battle Through the Heavens?

The title doesn't match the story. This book should really be called The Male Protagonist: A shut-in who loves anime and cultivation transmigrates to the world of Soul Land after an accident, then gets a new body (LoL) and a powerful System. At first, the protagonist plans to reach the peak of this world, but... will it really be that simple?