I don't think we should see Fett delivering the plans because unless we can get across the idea he is getting something worthwhile out of it then it would just seem like he is changing sides. Admittedly a bounty hunter should be on his own side really but given the rivalry with Han and the fact he was working for Vader in ESB it seems like too big a change for me.

Also I would avoid making the Bothans furry. I know that is from the EU and it might only require filming a gloved hand, but so far I don't think there has been a single edit that uses newly filmed footage of characters (though feel free to correct me if I am mistaken). It would be nice to be the first to do this but I think it would be much more realistic to find a clip of a hand reaching out to a console from Star Trek or Stargate or something like that and editing it to look more Star Wars, and there are going to be far more human clips than furry humanoid clips. This would only require people to watch a lot of dvds or tv and eventually spot a suitable clip (not too unrealistic) rather than finding access to a good quality video camera, lights, and props. If we could film new shots then it would be great to get some shots of Luke in black for new Dagobah scenes where we avoid seeing his face, or new commando and stormtrooper closeups against a forest background to add padding to the Endor battle. But to be honest I just don't think its anywhere near as likely as it is more fan film than fan edit and fan films tend to cost a lot more money to make.

Sorry if I am sounding a little negative here, I would love to think we could, but I think it is something to consider last as it would be the most work intensive of all the ideas suggested.

Having said that I still would love to see a scene with the Bothans stealing the plans, just let Bothans be human to make clips easier to source.