The entire point of a non-licensed theme is to have creative freedom, all you're asking for is more rehashing of safe and familiar things.
So my vote is none of them. Has pinball really gotten so dull that we can't possibly consume it without having the theme pre-chewed for us? Let's at least be better in our aspirations.
Black Knight looks great, good familiar territory, not mad. But I'd be sad if recycling the 90s was the only path forward beyond bands and movies and comic books and TV shows.
The theme I want is the one I didn't know I even wanted, because it didn't exist until it was unveiled, ready to bring me into a new world. Last new game I bought was TNA, if I bother buying new again it's going to be something actually new, not something nostalgic. I realize I'm probably too close to alone in that to be catered to, bring on the licenses and remakes. But I'll keep my wallet closed for them.