Of course they aren't in. Putting in multiple characters from one third-party franchise would be a horrible idea when you can have other third parties in their place.
I have heard that Knuckles is going to be an AT though. Oh, and Krystal is in Brawl. But that's old news.
Krystal is not yet confirmed, nor is it a leak. There are some good
pointer of her inclusion indeed, aside from one of the few potential real leakers
on the smashboards, but there is nothings sure yet. Same goes for
LuigiThe knuckles and Tails thingy was indeed to be expected, but there will be a lot
of fanboys left disappointed.
Also, I've been thinking. These screens and stickers are only available for characters
that can actually play in the Subspace Emissionary. Perhaps there are some characters
that can not be used and are only available as bosses.
There is also a small hope for the possibility that not all characters were unlocked when
the movie was made. It's a ridiculous idea in and of itself, but I still hope Mewtwo returns,
so bear with me.