I don't know how Frozen is going to turn out when I see it next week, but what I do know for sure is that you must see Get a Horse, the short that's attached to it.
It's best to avoid spoilers for it, the surprise will be worth it. But yes, it does involve hand-drawn animation. I've seen it three times as of now (a special early screening including an encore in September and an animation showcase that played at Capilano University weeks ago).
Absolutely fantastic. Spending your money on Frozen will be worth it just for this.