The Admin

Romeo, also called The Admin, is a character in Minecraft: Story Mode: Season 2. He is known as the one who created everything in Minecraft. He can change the time, build huge structures within seconds, delete and create items out of thin air, send people to other dimensions without a portal, change the biome, and change his physical form. The person who actually created Minecraft was Notch.

Reasons why he could be Steve's son

 * His second form was themed around Ocean Monuments, which were added around the time Notch left Mojang.
 * He has became crazy, as he does not like friends saving each other and wants only one winner, to join beside him. If he really is Steve's son, then this would explain why he is crazy, as Notch quit Mojang in real life and his grandson would not own everything Notch created.
 * The Ice Golem, one of the mobs that he created had a pumpkin on it's head. If the pumpkin is removed from it's head, it's face resembles Notch's.
 * The Icy Ender Creepers were combinations of Creepers and Endermen, made of snow, which all 3 were idea's of Notch's. This could also be why his 2nd form was a Snow Golem.
 * In the target practice range in the Icy Palace of Despair, both Steve and Alex were targets.