The departed worlds

On earth there lies a man who was known as the greatest genius of the world, he comprehended basic math and linguistic skills at one and moved on to advanced therioes and application in all main categories being math, science, language, history ect. At 12 he graduated from the most prestigious school with doctorial degrees in multiple areas. A couple of years later he invented technology which broke the minds of the old scientist who lead the way at the forefront of science and technology. But then all of a sudden he dissapeard, some say he died from a jealous attacker, some say he broke through the limitaions on space exploration and started exploring. But, no one had guessed hes living as a hobo underneath a bridge passing his days inside his mind and begging for money.

The once smartest man who could have gotten any country to do anything to have him:zero. The man self deemed zero lived life doing nothinh because there is no challenge but this all changed when half the world turned to zombies and the rest teleported to an area later known as the starting world.

What will become of this man named zero?