Dude, this will NOT do as well as a Disney movie at the B.O. It's still to "girly" to appeal to an audience as wide as not only Disney animation flicks but Dreamworks, Illumination, Fox, etc.
2D is dead since too many years ago, the last 2D from Disney was "Princess and the Frog" and it barely crossed the $100million mark in the US.
My prediction is around $50-60 million in the US and more than $100m Worldwide.