The thing I don't 'get' about Loz is that;
Okay, let's do a thought experiment here and say he's legit, but just being an *** about it.
Why does he basically go out of his way to disagree with all the points that Vergeben has made, when Vergeben has been right up to this point?
And then it kind of hit me.
Loz has mentioned something about 'scripts' in the past, meaning that whatever he actually 'does', if anything, probably has something to do with translating.
So in theory, of course he wouldn't know why Vergeben has said characters like "Isabelle, Ken, Incineroar", if he hasn't actually worked on any documents that involve them yet. If they're to be shown in the final direct, then up til now, he probably wouldn't have ever known about them being in the game.
This would explain why he'd supposedly know about K.Rool and Skull Kid soo early on, due to working on their scripts, and why he's soo adamant about no Isaac.