The first ending I'd like to purpose is that the d-class dissapears somewhere into Mexico or somewhere. This ending I think should be hard to achive. Also there wouldn't be any clarifacation to where the he went, but rather being able soto see him on a beach somewhere after the credits.
The second one would be the player making a deal with 079 to transfer it to a new piece of hardware. Promptly 079 locks you into a room and tells the guard your position and as they aproach it unlocks the doors, allowing the guards to kill you or capture you.