ImperialFighter said:
Personally, I’d love it to involve Threepio and Artoo heading off together towards a twin-sunset, as Threepio then says “Come along BB-8!”, and he then excitedly rolls into view behind them as Artoo beeps and whistles approvingly…before we fade to the ‘iris’ and end credits.

I think that would be an awesome end scene. Particularly if it was just the one line. Give the scene room to breathe the same way Luke and the twin sunset did in 1977. It would be a perfect way to wrap up the original saga. The droids, old & new heading off into the sunset.