What have you been reading/watching on TV lately? The first one sounds like Freddy Krugar vs the Jedi Knights.

Anyway, the theme I see is that you are righting wrongs and being the hero. There can't be a hero unless there is something horrible for the hero to fix, so I'm not really sure that these are nightmares. I'd say that your subconscious is telling you that you have the ability to overcome adversity for yourself and others.

Some of the images are a bit disturbing, but I notice that you ran after the killer (did something), and did something to the rapist, but only yelled and thought of doing something to the screaming boss. Even in your dreams you have an ethical line.

I'd say you're a good guy with lots of strength of character.