Aight so here is my idea:
My idea would be a "battle: la" style intro sequence (if you are familiar with the movie).
1) open with a city. civilians walk and enjoy their lives in the peaceful calm of the urban environment.
Cut to:
2) a man in a military uniform working in a dark light room at a video monitor. a big partially concealed PHALANX emblem is on a wall in the background
3) camera moves back to reveal a scene of a large control room environment. setting the scene in the radar room of a phalanx base
4) camera zooms in on a big monitor showing earth. suddenly, a siren goes off.
5) the monitor screen zooms to show a satellite view of a small location on earth (say, new york city). several large red dots
cut back to:
6) the futuristic city. citizens look up into the sky. camera pans to reveal several harvesters screaming out of the sky onto the city, along with orbital entry vehicles that resemble comets impacting
7) the people begin to run in mass panic as the harvesters land and unload hordes of aliens (the first 3 main alien types).
cut to:
hand-held camera style news report footage of the aliens gunning down helpless people as security and police forces attempt to hold off the attack. ends with a shot of an alien shooting into a camera, causing it to fall.
cut to:
9) a scene of a wounded civilian crawling through the burning wreckage. an ortnok steps on him, and the camera zooms to the barrel of the plasma gun as it fires. cuts to black.
black dissolves to:
10) the phalanx logo on the side of a drop ship. camera zooms out to reveal a sizeable force of phalanx drop-ships and stiletto aircraft flying in formation over the burning city, ready for action
11) drop-ships land, and phalanx troops in combat armor jump out. camera zooms to the helmet of the lead soldier, fades to white
12) Title screen
