Look at this..
It turns out that, although five titles are officially known to be in development for Xbox 360, it's not the case that this is all the support Xbox 360 will get from the team. Itagaki refers to the five titles as being a road map for Team Ninja. His team would like to produce, at the very least, five Xbox 360 titles.
If thats not encouraging, I don't know what is
5 is just a roadmap?
Ok I've teased you enough...go now!!...
It also seems that Cronus could indeed be about Ayane and Kasumis childhood. They talk about the word "child".
Why they say at the end of the article, they doubt the 5th is Gaiden doesnt exactly make sense to me. Why couldnt it be? If it wasnt, ya'd think he'd come right out and say NO.
If 5 is just the beginning, I doubt a Team Ninja game will see the light of day on the PS3.
Team Ninja rocks!!!!