Honestly, I was a little bit disappointed with the movie. I thought that the movie would somehow be like a mini-sequel to what happened after the anime series, even a prologue would've been better.
It all turns out to be using just the same plot with the series - Hitomi gets pulled into Gaea, she meets Van, become very important especially when it comes with Escaflowne and they fight off Van's brother and the enemy. What makes it different is that, instead of Folken being just a very important commander of the enemy, HE is the 'head' of the Black Dragon that terrorized the people in Gaea (at least that's what I remembered).
The love story between the two main characters was all shortened - it was really fast paced, no Allen-Hitomi incident, no jealousy, not really that much chemistry all in all. The ending suck too, Folken's death was pretty lame for me - he died from getting stabbed at the chest by one of his men who did it for revenge. ¬_¬
All in all, though the works was all right, the fact that nothing new, maybe except for Folken's hair being really long and somewhat bushy-like, happened is a downer for me. I would rather you guys just watch the anime series, as there is more and it covers what the movie is pretty much telling you about which really was just fast paced version of the anime series, the anime ended better too.