Price of Perisa died since after the launch of Two Thrones.
Well... it was Ubi's own fault. But i would point at the PS3/360 remake as the problem. They went cartoony on a series that is mainly mature. It didnt make any sense.
Also, they cant keep rebooting it all the time. They have to come up with a story for another trilogy and make a beautiful game with some quirky humor like the PS2 reboot. Also, it needs to be something more than just some wall running. Actually, they could very well use the AC engine and give us a representation of old Persia in a sandbox envyronment.