From what Luna said about that cutscene the plot line I think would happen is when Bard shows up, Thorin will scold him and the men in Lake-town for not helping him retake Erebor, they don't deserve any of the rewards, etc, etc.
Also, in the movie did they change it so that one of the rings is still in Erebor, or does it still follow the book in that Thrain had it with him in Dol Guldur? I'm just wondering cause Faefrost mentioned its possible influence on Thorin.