I don't think that's the case at all. Remember, the Muppet film before the last one went up against Hunger Games and like 3 other kid's films. Sure, it only made a modest amount at the box office (due to the release date...more on that in a minute), but it managed to edge out the weaker kid's movies and hold its own against HG. As far as Pooh vs. Potter, that's a little more complicated. Logically, it's a younger kids movie for those who are too young to sit through a Harry Potter without fidgeting or screaming and crying. However, there was a snag. Disney basically turned Pooh into a preschool franchise, and trying to break out of that with a movie when "My Friends Tigger and Pooh" was still on the air or fresh in the kids' minds (or at least still on the network) when the film came out. Poor timing did hurt the film, but the degradation of the franchise was what doomed it. And it's a real shame, since that movie could have brought Pooh back to what was great about it. Then there's the fact that kids young enough to be Pooh's fanbase would have been too young to take to the theaters, but would be perfect to watch on home video.
Now, with Peanuts, that's a sizable nostalgic audience. It's a well known franchise and it's coming out close enough to Christmas that you're essentially surrounded by Snoopy stuff anyway. Not to mention the fact Bond isn't going to be a movie to take the kids to see. This thing has been aggressively marketed, especially to kids. No doubt this will be a family film that the parents don't feel they're being dragged to. Not to mention the fact that...well... Snoopy's as big as Mickey Mouse (if not slightly bigger) internationally. I see this film exploding in Japan, maybe even China (that's where the Garfield movies made their money...imagine how a good film will go), if not other international areas. I think that Bond and Peanuts will have hard competition with each other, but there's enough of a younger demographic slant to give Peanuts the edge. Plus, as a family film, it's released in that sweet spot before Thanksgiving. Most family films do their business there. Wreck-it Ralph, Big Hero 6, Puss in Boots.... That said, the last few Bond films didn't exactly get a warm critical reception from moviegoers. They made money, but you'd think that they were the worst Bond films ever, except for the 90's one.
The film I'm worried about is Good Dinosaur. And only because the Thanksgiving release date is an all or nothing gamble. It's the real test of a film's popularity if it can hold up past the weekend following opening. There's a steep dropoff because there's a period between Thanksgiving and Christmas where there's a lull in movie attendance. That's what killed Penguins of Madagascar (which I swear was a sacrificial lamb, as Dreamworks swapped Home out for a March release). Big Hero was still in theaters, Hunger Games too, and the next week would have a painful dropoff for movie going. Hopefully the Pixar brand is strong enough to weather that.