The cost of those next-gen titles, Guillemot says, likely won't cost much more than current-generation budgets, but that's likely to change as the install-base expands over time. The new consoles should allow "the number of customers to grow a lot, justifying larger investments in the future." This lines up with publisher Take-Two's expectations, but as Ubisoft gets farther from the Xbox 360 and PlayStation 3 era, "I think the cost will continue to rise because the potential in front of us is huge." Guillemot continues, "The power the machines have is helping to make it easier to develop on. At the same time, the potential offered is enabling us to do a lot more."
Rayman won't be Ubisoft's final effort on Wii U, despite the platform's struggle to sell, even as it loses its position as a high-profile exclusive. "We have a pipeline of games of very high quality coming on that machine, like Rayman Legends, which makes fantastic use of what the machine can do," says Guillemot. However, he points to Nintendo itself for the future of quality Wii U software, and says "they will make the necessary changes to the machine to make sure that it continues to grow fast on the market."
Guillemot revealed a new, untitled Assassin's Creed sequel today, but did not specify whether it's destined for current or future platforms. It's possible it could release on new hardware as well as older machines; during the Xbox and Xbox 360's transition period, Ubisoft released Splinter Cell: Double Agent across both platforms.
With Prince of Persia on hiatus, and Rainbow 6 Patriots delayed indefinitely, the future of Ubisoft's biggest franchises points to next-gen. For the foreseeable future, however, Ubisoft remains a vigilant supporter of everything you already own.