MIB4(Ghost Protocol) is due out this Xmas. So Totoro and MIB4 will be 2 Brad Bird films competing against each other.
I know it's a joke, but Brad Bird directing Totoro would mean he's got to be working on it for at least the last 3 years and this year. MIB4 should have been done shooting last fall and already in post. Plus I'm not sure Pixar has released anything in the winter since Incredibles, leaving the holidays for the Disney CG animated movies instead. Pixar is confident enough to hold up against the summer blockbuster juggernauts.