This is an idea that came to mind.
A Halo role play where the person could play either Sarah Palmer the spartan commander or Cortana. I of course would play the role of Master Chief also known as spartan 117. The plot line if you choose Cortana is that instead of the ship floating to shield world requiem, they floated in the Forward Unto Dawn to the black planet of Onyx and are experiencing an attack from the covenant there. If you picked Sarah Palmer the regular course of events happened and the chief is without Cortana. This would take place shortly after the end of Halo 4. We could go in several different directions from here, to onyx where on the way there chief would be outfitted with a new AI, or back to earth for a ceremony and such then possibly re-assigned to train the future generations of spartans.
I am also open to a lot of ideas and am a very versatile role player so please do not hesitate to ask if I would like to do a different role play. Thanks and hope to hear from you soon! Z3RG