My biggest problem with these leaks/fakes is that Dr. Mario and Dark Pit have a slot and that Ice Climbers have none.
Ice Climbers appear in only one game and it was released in 1985. Sakurai brought them back from Nintendo's graveyard with Melee. Since then, they became more popular and their game was re-released on GBA, Wii, 3DS and then Wii U again last year.
Their recent popularity is only based on Smash Bros. At this point, they are more Smash Bros characters than the heroes of their game. Them not being in Smash Bros roster makes no sense to me. The polar bears are even in the Smash Run mode. I don't understand why they'd be cut or proposed as DLC ?
Wolf or Snake, I would understand. They are fan favourites, they have a fan base, why not DLC ? I'm not saying Ice Climbers have no fanbase, but do they have enough fans to make it interesting for Nintendo to ask players to buy them ? I don't know. This does not seem like an obvious choice.
And we have Dark Pit and Dr. Mario. Two slots for what could have been a palette swap and an alt costume. Alt costumes is a thing people have been waiting for for a long time. And Sakurai showed us he heard the fans, Little Mac himself is a great exemple of great and thought-out costumes. Dr. Mario was even cut from Brawl for being too much a Mario clone. And Dark Pit is just a different colored Pit. Even in its own game, he's called a "flawed clone".
I'm not claiming real or fake here. I'm not an Ice Climbers fan either. I'm just pointing out stuff. It's not just the visual aspects of this leak we can discuss. As a matter of fact, I find it very convincing looking and I wouldn't mind Bowser Jr.,the Duck Hunt Dog or Shulk as new characters.
In fact, if Ice Climbers were in and Dark Pit and Dr. Mario were out, I'd jump on the TeamReal train. But I'm TeamLetsSeeWhatHappens, these (imho, poor) roster decisions cast doubt.