Cortana is not a cheap suit... (Computer Graphics) Creating Cortana as merely a hollow, cartoon-like character will not approach the level of maturity that this character has. She has developed in hundreds of hours of gameplay for millions world-wide, and simply to make her a cartoon character will lose the nature of who and what she is.
So the question remains: Person in a suit, with all the nuances and movements of a person, or a complete CG being?
Even is she's a 'real person' it may backfire. Julia Roberts as Tinkerbell comes to mind.
Wooden or CG props are not acceptable... (Props) When props are used, they should look real. I'm not talking about having the MC hold a wooden toy, and we are to use our imagination, I'm thinking metallic, right reflection, good weight.
This is an interesting point. Even TV series like Stargate, have realistic looking weapons. The alien weapons have kick and can cause as much damage as we would expect. So including non-wooden, high-powered toys would be an awesome idea.
MC holds up first *real* BR... to the obvious groans of tell-tale plastic sheen. :(
'kill me!' (Scenes) Flood scene where obvious former 'buddy' human is now a flood, and the turmoil as other soldier(s) or MC realize they have to kill him/her. Cherry on top is that flood hasn't completely subsumed personality, so creature's last shreds of humanity come out and plead for help/quick-death.
According to the rules, this entry is fine, because even though something similar occurs with Keyes and MC, the storyline is above reproach. If they pour on the schmaltz (ala Matrix death scenes), it'll suck.
Starring Stuntmutt (Comic Relief) A character such as "Jenkins" marine from the first flood scene, or even Cortana herself, are tagging along as comedy rather than actual characters with depth and purpose. This would Halo fans to groan at more than just bad jokes.
Bad grammar aside, this is a good point, though possibly already iterated in some form or another already here. There is a fine line between getting laughs and getting laughs in the face of danger. (Hudson in Aliens)
Wort wort wort (Dialogue) Master Chief is in a tough spot... and starts talking to an Elite... who responds by giving a human-like shrug and saying, "Wort wort wort." Then, the Elite lets MC go.
Lame re-use of existing Halo dialogue would be bad. Subtle homage is one thing (Hulk's dream in Ang Lee's Hulk movie where Hulk gets to say 'puny human') but just inserting it for any reason isn't cool.
The last one (Scenes) (scene) There should be a heartbreaking scene in which the Master Chief is going into some covenant infested area (Two betrayals esque) with one other marine, the Chief is hit by a ball of plasma knocking him down and depleting his shield. Another ball of fiery death streaks toward the chief, and the marine realizing that the chief is the last hope, jumps in front of the ball, saving the chief but losing his own life.