A Game Guide that has recently appeared on Amazon gives a possible hint that the multi-platform title Sonic Unleashed will become Sonic World Adventure.
Whilst there is no cover for the Strategy Guide on Amazon's Page, named as being for Sonic World Adventure, the release date for the book coincides with Sonic Unleashed's November 4th date.
Adding more weight to the rumour, is a preview page from Prima, the makers of the Guide Book, which states that Sonic World Adventure will hit the Playstation 2, Playstation 3, X-Box 360, and Wii, the exact same 4 platforms as Unleashed.
Since the Screenshots and video of Sonic Unleashed were leaked before any confirmation from Sega, it wouldn't be too far-fetched to assume this one as genuine either.
Update
According to Sega Europe Blogs, Sonic World Adventure was simply the original name for Unleashed, and Prima have yet to adapt to this change.
The mix-up is understandable most certainly, so I'll explain the base details. The rumour started when a guide appeared on an online store for the game "Sonic World Adventure", keen-eyed Sonic fans spotted this and reported it and so the snowball began. Sadly this is neither a new name nor a new game but infact an old name. You've got it the wrong way round fellas!Unleashed was indeed, at an early developmental stage, going to be called Sonic World Adventure, it even had a WIP logo of sorts that featured on a verrrrry early cut of a promo video for the title. Who knows maybe in some dim and distant future said video will appear, but no - Unleashed Sonic is so Sonic Unleashed it shall be.
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