Pelé!

Pelé is a popular Brazilian soccer player who had a game in development on the SNES in 1994. The only released version of Pelé! was on the Genesis, where it even got a sequel: Pelé! II. The SNES version was unfortunately cancelled, unsurprisingly coming from Accolade. The game was finished, as it was shown in Nintendo Power's NOW Playing section, which only covers released games. There isn't many screenshots of the game, and the only interesting thing to note was that Pelé himself had involvement in the game itself, which would've been a first for sports games. No ROM has popped up and this game is usually forgotten when unreleased games are mentioned, so it's unlikely we'll find one soon.