It's sort of a good-news, bad-news situation.
Ubisoft is indeed creating a new Assassin's Creed entry for 2015 and the bad news is that it'll use the same technology and engine that powered last year's Unity .
As we all know, the game had significant problems when it first launched. But the good news is that Ubisoft CEO Yves Guillemot believes the major issues are behind them :
"When you [build a new engine and tools], it's painful for all the group, and everything has to be recalibrated. And with [Unity], a few things were not perfect when the game was launched."
Guillemot added that the "steps are sometimes painful" but they'll ultimately allow the team to improve the overall quality of the production. He's confident that thanks to the lessons learned last year, they'll be able to take the once-revered series to the next level. And he thanks the fans for being passionate:
"At launch, the game had suffered from framerate issues and bugs which have had a strong resonance among the community," he said. "We are blessed to have such passionate and committed fans, and we will always strive to earn their trust and support. We took that situation very seriously, and our teams have been working relentlessly since launch and have provided constant and direct progress updates to our fans."
The rumor is that this year's AC will take place in Victorian Era London and if they fix the problems, it should be downright awesome.