Haze, Splinter Cell Delayed
What with Assassin's Creed being one of the best selling new IPs ever, Ubisoft probably didn't think much of having to push back the release of Haze until next year. They've also moved the next chapter in Sam Fisher's story, Conviction, to an unspecified date in the 2008-2009 fiscal calendar. "The announcement came as part of its official first half financial results, showing sales up 52 percent to 261 million ($372.86 million), and profits up nearly 12% to 30.6 million euros ($44.8 million) ... the company [also] announced Tom Clancy's Rainbow Six Vegas 2 due for release some time in the same quarter as Haze."
I'm a bit confused over your comment.
POP4 was "Sands of Time" which actually won game of the year when it came out
POP5 was "Warrior Within" which was IMO a mediocre title
POP6 was "The Two Thrones" which I never bothered to play as it looked too much like POP5
Then of course there are spin offs such as: "Battles of Prince of Persia" for the DS, "Rival Swords" for the Wii, and the "Prince of Persia Classic" which is a remake of the original with updated graphics for Xbox Live Arcade.
so technically the next game would be #7 in the series
Collector's Edition