Mind If I show you Shadow's future self's abilities?
1. All his Current Powers
2. He can now use mental abilities to bring a person's worst nightmares to life
3. He can travel through time at will without a time machine or anything. (Future Tech Implants inside him. )
4. He can Fly and fire dark laser blasts from his eyes.
he's making a monument to his power byt turning there half of the new world into his domain basically. He thens plans on collecting the combines energies of the new world and taking it in himself to become immortal and all powerful so that he can take on the Gods of his world and absorb them
He basically wants to become all powerful and become the top of the universal food chain
because he's just like that