The head bumping Stormtrooper could become the Jar-Jar of the OT, constantly causing havoc switching off the tractor beam (before Ben gets a chance to), shutting the blast doors while other troopers are still inside cutting them in half, all the time bragging how great he is and gossiping about trival events in his life (like the stormies in Jedi Outcast). At the end of ANH he could accidently stumble into an escape pod meant for Tarkin and survive to continue his buffoonery in the whole OT.

The Dianoga (in obvious CGI) could make random appearences around the station pulling background characters through vents without anyone else noticing.