A two-headed sea serpent might be creepy, and even somewhat cool, but I think too many movies have recently shown multi-headed creatures, and i don't want Narnia to be seen as a series that copies the work of other movies.

I repeat, my point was that I did NOT want a sea serpent with multiple heads, that I would be just as upset with one of those as with multiple sea serpents.

GlimGlum has some good points - I really think there's only going to be one sea serpent. But if there are multiple ones, I'm thinking three. These things always seem to come in threes. Or ones. Or...agh, I'm confusing myself.

I guess we'll just have to wait and see, huh?

I agree completely, Dinode. Having one sea serpent with its own singular head is all I will be able to put up with.

I think another problem with the multiple sea serpents idea is that it won't be clear when/if the battle is over. If there's just one monster, when they defeat it that will be the end of it, but if more are constantly popping out of the water, there is no clear end to the battle because they will never know if more are down there. (Unless the water is extremely clear, and I don't think they're going to do that with this scene.) I don't really think it works from a cinematic standpoint, especially since it's supposed to be at the end of the film, where there needs to be closure. But we'll see!

This scene is going to be big and epic no matter how many sea serpents there are. I think they are going to make the sea serpent one of the enemies (other than the darkness) that the crew will have to defeat at the movie's end.

I'm pretty sure it's a typo since, the trailer only shows one sea serpent.

The trailer only shows one and it is so big the DT wouldn't stand a chance against multiple ones, whether they have a small dragon or not.

haha, it's Twitter, where spelling and grammar takes the backseat to being succinct and efficient.

^^ exactly! it's most likely a typo.....

or maybe he meant
(warning: if you don't want spoilers, don't read this):

maybe except

Who called Eustace a ?

well, there is only one sea serpent in the movie, so rest assured