Generations follows the exploits of two Sonics: modern pre-Boom Sonic and classic Genesis Sonic. It appears, however, that a third Sonic based on his Dreamcast iteration, may have also been considered.

The rumor comes from the latest episode of Did You Know Gaming, which covers Sonic Generations. You can check it out below.

You can check out other videos from the Did You Know Gaming channel covering Phoenix Wright, Kingdom Hearts, South Park: The Stick of Truth, Golden Sun, Splatoon, Chrono Trigger, Uncharted, Super Mario Maker, Silent Hill, Sonic Adventure 2, Jak & Daxter, amiibo, Metal Gear Solid V: The Phantom Pain, Persona, Dr. Mario, Dragon Age, Zelda: Majora's Mask, Tetris, Monster Hunter, Grand Theft Auto, Halo, more Halo, The Last of Us, Pokémon, more Pokémon, even more Pokémon, Pokémon Snap, Assassin's Creed, Mario, Jet Set Radio, Mega Man, Fire Emblem, Donkey Kong, Killer Instinct, Rayman, Mass Effect, Dragon Quest, Guitar Hero, Final Fantasy, Castlevania, Star Fox, Punch-Out, Metroid, Zelda, more Zelda, even more Zelda, Final Fight, Doom, Dragon Ball Z, multiple Super Smash Bros. videos, Team Fortress 2, Harvest Moon, Tony Hawk's Pro Skater, the history of the NES, Genesis, Dreamcast, PlayStation 2, Xbox, GameCube, Nintendo 64, the DS, the PlayStation, PlayStation 3, and two covering the Game Boy by hitting the links.

[Source: Did You Know Gaming]