Takao said:
Regardless of whether or not people think its a good thing or a bad thing, I hate false information being spread.
We pitched
Shinobi to Sega as a 3DS game. It was never considered for release on the DS or the PSP. Additionally, absolutely nothing from
Assassin's Creed: Bloodlines for PSP was used in
Shinobi - that game used a completely different engine and obviously completely different gameplay. As another poster surmised, the video was much closer to a 3DS version of
Assassin's Creed: Discovery than it was to
Assassin's Creed: Bloodlines anyway, though nothing from Discovery was directly used in the actual
Shinobi game either. The focus of the video was to demonstrate potential gameplay and the state of our 3DS tech at the time - that does not mean we used the game the video was built with as a basis for the actual project.
In conclusion:
Shinobi is not an up-port of anything, nor was it built on the remnants of any older projects. The idea originally came up as a possible 3DS pitch and was designed and built for the 3DS from the start.