Has There Ever Been A ''UP'' Crossover?

The movie UP has always been my favorite Pixar movie and I just thought. What If there was a ''UP'' crossover? I'm asking this because it's been in my mind for a while so I'm wondering if there is a UP crossover or there isn't yet? Maybe carl and rustle get sent to equestria, or maybe the main six stumble upon a flouting house with two humans in it?

I'll try to come up with an idea my self, but if anybody else has an idea your free to making a story.
Until Next Time!!!