I suppose somebody should provide the "real" translation of the Japanese dialogue here. Straight from GameFAQs.com:

A.D. 2101
The war began

Outside Ship - An explosion occurs.

Ship's Bridge
Captain: "What happened!?"
Mechanic: "Someone detonated bombs all around us!"

Close-Up of Excited Communications Officer
Operator: "Captain! Incoming transmission!"
Captain: "What!?"

Ship's Bridge
Operator: "Image coming through on the main monitor."
(CATS appears)
Captain: "You... you are...!!"

Close up of CATS
CATS: "You appear to be preoccupied, gentlemen." (sarcasm)
CATS: "Thanks to the cooperation of the UN forces, we've taken over all of your bases."
CATS: "Your ship too shall soon be destroyed."

Close up of captain & CATS
Captain: "Im.. Impossible!"
CATS: "We thank you for your cooperation." (more sarcasm)
CATS: "Enjoy the remaining moments of your lives...."

Ship's Bridge
CATS: "Hahahahaha ...."

Close up of Forlorn Captain
Operator: "Captain!?"

Ship's Bridge (ZIGs on monitors)
Captain: "Launch all ZIG fighters!"

Shows a ZIG pilot powering up
Captain: "We leave it up to them..."

Shows a ZIG moving into launch position
Captain: "Give us hope for our future..."

ZIGs on monitors, Bridge Explodes
Captain: "We're counting on you, ZIG!!"

The ship explodes.
A lone ZIG zooms into view!

translated by WooJin Lee and two sheepishly anonymous persons.

...and, in case you couldn't guess, that lone ZIG fighter is being piloted by you, the game player.

And so the adventure begins....