The last piece I want to complete this thread needs to be created. I don't know exactly how. It is this: We NEED to SEE Shmi in danger and KNOW it's from Anakin's dreams.
This would be really really cool and really fun to do. When I made a film which had a dream in, I zoomed in on the actor's face at the start, cutting to a slomo monochrome movie with the contrast turned down of what is in the dream. You could even add some particle clouds round the edges of the shot. It looks really good, and it is quite easy to do.
Another thing specifying a dream is to use hue/ saturation and turn the saturation waaay down and click "colourize". Then change the colour to a deep red/ blue/ green/ yellow, etc. It shows that it is not really there.
Yet another thing that can work is you can turn the contrast up. This makes it look fake and weird.