The Romulans and a personal cloaking device = backstab'o'rama. Would be fun to watch, except its all cloaked and all... "I'm the Emporor!" "No!" STAB "I'm The Emperor!" "No!" STAB and so on and so on...
Honestly, you want to make a million trekkies shiznit in their pants... (Uhura back in the day flashing Spock during an away mission shiznitting mind you) Have a Tholian Carrier unleash it's fighters against a Fed Dread... or even... better... A Kzin Strike Cruiser unleasing a full Alpha Drone Strike against a Chandley Class Frigate, and the frigate does the drone shuttle 'flower' back at them after picking off the drones with a volley of phaser IIIs. THAT would make a good movie.