Dan will have a review of Disney’s A Christmas Carol later this week, so I don’t want to spoil his thoughts or give any details away, but I will say this: Despite all it’s lavishness, it’s missing one key element – heart. In fact, to better illustrate and to introduce my pick for Trailer Tuesday, I will say DreamWorks Animation’s forthcoming How to Train Your Dragon has more heart in two and half minutes than Robert Zemeckis’ A Christmas Carol …