"That embarrassingly melodramatic, deservedly ridiculed "KHAAAANNNN!!! is MEMORABLE, if over the top, something you can't say about any scene between Shinzon and Picard. The movie isn't memorable and was never seen by a broad audience.
My comment about the fights on scaffolding is not a non-sequitir by the way, it's how every confrontation escalated in the last few Trek films (and a physical fight of some sort in the TOS films), and this thread is now, because you derailed it, discussing having Montalban and Shatner in a scene together. Sorry derailed may be too harsh, if you really think that the character and portrayal of Shinzon of Remus (a laughingly silly name, character concept, etc. in my opinion) is the BEST trek movie villain then good for you. I'm just surprised that any real fan of Trek thinks that, but hey, IDIC isn't just a neclace sold my Lincoln Enterprises. I will say that since I saw Nemesis, I firlmly felt that it would have been greatly improved if it had been rewritten to have Shinzon age in the second act to be portrayed by Stewart, opposite himself. Only that would have made that film more bearable for me, and the character of Shinzon any more than a footnote as the 'lame bad-guy that killed the modern Trek franchise'
The fact you can't see how their lack of face-to-face confrontation has an effect on 'if' the story is formulaic shows your knee-jerk reaction to this topic. The formula, used in ST III, V, VI, VII, VIII, IX, X was to have the hero in a physical fight with an adversary. A lot of Trek employs this FORMULA, and I'm glad TWOK didn't.
I'm also glad that Kirk and Chang had a chance to sit and spar without a physical exchange, but their dynamic was different than Kirk vs Khan and the way it was handled in ST II really keeps it in favor with many fans.
We are all Trek fans here, it's no crime to have different favorites, and reasons for them. I love ST II and IV for the way the hero/antagonist dynamic is handled, and you prefer Nemesis. That's cool, as they say on earth, c'est la vie.