Yes, here's another one of those "let's jump to fun conclusions based on a third-party-hosted online survey" news posts! GMI Survey has an Assassin's Creed 3 post-mortem survey online (via Joystiq) that asks a lengthy series of questions about your gamer experience, your time with AC3, and, most importantly, the future of the Assassin's Creed series and what you'd like to see from it.
Don't read too deeply into these questions, though it's worth running through the survey if you want to let the powers-that-be know what you'd like to see more/less of in an Assassin's Creed game. Possibilities such as co-op story missions, underwater action, second screen functionality, and a new present-day hero are all mentioned (among others).
Ubisoft hasn't mentioned anything about its future Assassin's plans beyond the upcoming Tyranny of King George DLC; this survey's results will presumably help inform pre-production decisions on whatever comes after it.