I wouldn't complain about it being too cold up north but....
It's too cold up north.
An average low of 36 degrees F in January in Paris is very different than an average low of 18 Degrees in January in Toronto. If that's not enough for you, consider an average snowfall in Toronto of over 52 inches, compared to an average snowfall in Paris of 11 Inches.
This would also clearly cannibalize business from the Walt Disney World Resort, and possibly even the Vancouver demographic of Disneyland Resort as well.
Now Twilight, I realize you don't like me (after having attacked me in another post for being negative for saying I was excited about what the poster had in store, I got the hint) so don't take this as an attack.
Take it as a challenge. These are clear and present dangers, and massive problems, and if you want to bring a resort here, they are problems you have to solve, but that's the whole point of modern imagineering! We have five (soon to be six) sprawling beautiful resorts! We have the advantage now of seeing what works and what doesn't, Cars Land works, Stitch's great escape doesn't. So I'm not saying that your ideas are stupid or pointless, I'm saying that these are real problems that have to be, at least considered and discussed, and I think since you brought them up, you know that too.
And while we're on the subject, I have another challenge for you. It's no secret that maintenance has gone crazy downhill over the past decade at Walt Disney World. Now obviously it's not possible to keep such a sprawling resort perfect all the time, but it could be way better than what we have right now. So, if you're planning to make your resort just as big (four parks) how would you combat that?
And if you're settled on four parks, I'm assuming that means you're expecting massive attendance, so if that is the case, you should really consider the sizes of your resort experiences. Consider the thousands of Hotel rooms at Walt Disney World, and 81% average occupancy. If you really are going to have four parks, consider building about 65% of Walt Disney World's hotel rooms and expanding from there if needed.
Now, once again, please don't take this as a personal attack, but rather as logistics that I really do think need to be considered.
Now then, that the boring stuff is out of the way, I have to echo Matt's question of what the basic ideas for the parks are?
I would probably suggest one of them to have a castle of some sort as their icon, I would also consider looking into a park themed to adventure, along the lines of a mashup of Disney's Animal Kingdom and Tokyo Disneysea. Perhaps also a park themed to real places around the world. Just a few ideas, what did you have in mind?