xdan0920
Think for yourselfer
Just because it was about Mexican culture that doesn't automatically mean the movie would be a hit there. It still has to be a good movie. It sounds like it is.
Not sure that's actually true. How many garbage animated movies make a minting here? A lot.
Besides, a major animated movie based on Mexican culture was going to hit big there, it's not like these things ever exist. The simple novelty of it, was going to insure it landed big in Mexico. Which is why Disney elected to release there first, and alone.