User blog comment:TheLoneClone/Will Bain Kill Smaug in The Battle of the Five Armies Film?/@comment-4828844-20140425024924/@comment-27182540-20140425032649

That's what I'm hoping for; or something like this:

Bain is getting the black arrow for Bard, who is at the giant crossbow-thingy. On the way back, Smaug attacks, and Bain has a little fight with Smaug, slightly injuring him. After being injured by Bain, Smaug injures Bain himself, and in anger, Bard runs in, takes the black arrow, and fires it with his own bow instead of the crossbow and kills Smaug.