Bruce Campbell is awesome as Ash. This movie is one of those, I can't turn away from if I find it on TV. In response to your question regarding time travel, I would suggest Yes, keep it with one condition. The character must come from an entry level service industry position with absolutely no experience or training in hand to hand combat or any sort of fighting skills. Ash was a grocery stock clerk. A veteran of the military, a law enforcement officer or martial artist might not fit the typecast "reluctant hero" that made Bruce Campbell's Ash so outstanding. But then, you could give people the option of starting in midievel times or the 21st century.