I love it! That had to be the only time I've come nigh to tears over something in a video game. Bungie did a good job of making us care for Cortana and the Chief. ...And you have done an excellent job of representing that moment! It brings to mind the part of the Sistine Chapel where God is reaching down to Adam.
when you are running around at the end of the last level, after cortana is blown up, but not 'dead', chief still hears her in his mind, meaning either he's insane (in which case cortana will come back in the 5th game like isaac's dead girlfried in dead space 2) OR she is still alive somewhere in his head.... also, HAHAHAHAHA the regular show thing was great!