I was expecting a "rinse and repeat" of the first movie
But I never thought about cloning, namely Quaritch becoming a Na'vi avatar, along with his squad of goons. That does escalate things a lot, and to me, the most poignant moment with Quaritch was...
SPOILER
...when he found his dead human remains in the exoskeleton outside the cabin that was the setting of the climactic fight in the first movie, takes out and surveys his own human skull, essentially, regarding it in a Shakespearean way, before crushing it in his Na'vi hand as if to say "I've officially upgraded".