Final Fantasy Crystal Chronicles: The Crystal Bearers didn't look anything like it does now back when it was announced. Back then it sported a super-deformed art style like the DS titles in the series and promised a multiplayer experience - but clearly the team decided they wanted to do something very different.
When the game re-emerged years later it was as a single player game with an art style not dissimilar to main-line entries in the Final Fantasy series, and gameplay that seems to take an Action RPG approach closer to Fable then Crystal Chronicles - but was it a worthwhile change?