There's "no point in being hasty" or 'cocky' about it, he cautions. Assassin's Creed IV: Black Flag and Watch Dogs "feel very different" and won't hurt each other this year.
The two are different enough as to be unique experiences from each other, but ultimately Morin can't control "what people will feel" if and when they pick these two up.
"Could be. I don't know," Jonathan Morin told VideoGamer.com, asked if they might alternate releases. "Right now I'm focussing on Watch Dogs The Game, and we'll see when it comes out and people can scream their reaction and afterwards we'll see what happens."
"There's no point in being hasty about those things afterwards. Let's just wait and see and not be cocky about it."
Assassin's Creed IV and Watch Dogs carry identical launches on Xbox One and PS4. "I think that Black Flag and Watch Dogs feel very different," he said. "If you had GTA, same thing."
"Those three are probably the biggest and they're significantly different games, so from that perspective I'm not concerned. I mean, I'm not in control of what people will feel when the game comes out, but I've certainly played pretty much all of them and they feel pretty different in nature so I'm not concerned about it."
Morin concedes Ubisoft is competing with itself to an extent. "But is it a bad thing?" he asks.
"If I'm Yves, and I sit down and I look at a statement that says, 'Okay, on the next-gen platforms the two biggest games at launch are two games from Ubisoft competing with each other,' that's more positive than negative as a statement. So no, I think it's fine. I think they're different enough, more than enough to sustain each other."
"Assassin's Creed is a brand that's been there for a long time so it makes sense that they have something for the launch, and us, it's a new fresh thing, completely different. So I think it makes a nice balance between the two. It's a good competition thing. I'm not too concerned about it."
Morin recently revealed that Watch Dogs on Xbox One and PS4 are capped at 30 FPS, and that Xbox 360 and PS3 versions carry mandatory installations much like Grand Theft Auto V, with Xbox 360 on two discs.
Watch Dogs releases on PC, Xbox 360, Xbox One and Wii U November 22nd. PS4 later on the 29th.