Well that's true. But how do we know that it isn't a side smash? Look at the various pics we have. Zelda's got some new poses. She's not so princessy anymore and looks like she's grown a little more badass this time around. I mean, the majority of those poses we've never seen before. New moveset?You can literally never tell with Sakurai.
Again, the biggest point of contention is the Phantom.
There hasn't been a single game where the Phantom has been non-super deformed.
They've always been in Wind Waker games and as such are in the cutesy art style.
If it WAS an Assist you'd think it'd be super deformed or in the Toon style, right?
But it's not.
It's Twilight Princess style.