I want Marth back alongside Ike. While I am excited to see Ike, Marth had a very distinct, graceful look and style.
Just because Ike and Marth both have blue hair doesn't mean anything at all. Thats a HORRIBLE argument, IMO. Besides, their hairstyles are so different! Ike's hair is more messy and spikey, with a ragged band of fabric around his forehead, while marth's hair has bangs and looks combed down more, and he has that gold hair band on his head. Not to mention, their hairstyles really doesn't affect the way they are played or what their movesets are.
Maybe they think of Ike as the best new FE representative, so they revealed him first. Marth could still be a surprise unlockable character later on, or maybe Ike will wind up being the unlockable one while Marth is revealed later as being standard, or maybe Ike really did replace Marth.
Or maybe they have no real rhyme or reason, and they aren't saving the good stuff for last like so many people think, but are mixing up the tasty new info with the bland old or more boring info.
If Ike does replace Marth altogether, I would rather he have his own moves and such, rather than be a clone of Marth. It seems so unoriginal and uninteresting to just give Ike a bunch of moves that seem like they belong to someone else. Besides, whether you care or not, Ike and Marth really ARE pretty different- Marth is the sleek, graceful prince, while Ike is a strong calculating mercenary.
I hope aether will be a special move rather than a Final Smash, but if it is a FS, I won't mind. Does anyone know of any other vids of aether being used other than the vid that zKillah linked to?