One more word from you or Hollywood.... and I'm putting both of you on ignore. You're starting to realllllllly irritate me. I for one don't believe that banner leak. That's not to say that some of those characters aren't in, but the fact that insiders aren't outright dismissing it tell me that it got enough things right that it's making them second guess themselves.
1. B-K, Ken, and Geno, I think are highly likely due to those sources and Verges, if you're giving them the benefit of a doubt.
2. Incineroar possibly is good if he's not leak bait.
3. I don't see Shadow going back to Assist so if he's indeed in, he's playable.
4. The rest of them are either ATs or a possible maybe in the playable department.
As for Isaac? As this came from a Nintendo event, I'm marking him as a near definitive yes as an accidental slip.
That's how I'm seeing things. There's still plenty of room for Shantae, I think.