I can understand Dark, because Swans can actually be pretty nasty personality-wise, and they pack a punch with their wings too. It'll still probably be Water/Flying, though.
Well that does make sense(The Psychic I still don't know about). We will probably get it's type near the end of the week and can finally lay this all to rest. Assuming the Swan will be shown.
On an unrelated note this picture came up in the Speculation thread:
Here's something interesting:
Now, there's a flag. And they are all roll-called. And they announce their plan in front of people. probably.
Looks like we have the leader or a commander.