It would require some creative editing, but maybe the beginning of his dream could depict related his ambitions of greatness, and then the vision devolves into both Padmé and his deaths. Something that shows him in a position of power, as a Jedi Master, or being the celebrated chosen one who achieved his destiny, or in a position of power in the galaxy. Like, he sees this power and greatness he will one day have, maybe alongside happiness with Padmé too, and then he loses it. That way, we know his fear of loss is not only tied to losing Padmé, but losing the power he foresaw him having.
It would be interesting if this could be tied to Palpatine. Like, he know these visions of power are tied to Palpatine, and being associated with him. It would be ironic if he was seeing his future as Vader, but depicted in a way that looks “good”, like he is Anakin rather than Vader, Palpatine rather than the Emperor. So he does he end up getting the power he saw in his vision, but not in the way he saw it. For example, imagine the scene at the end of the film, with Vader the Emperor on the bridge of the Star Destroyer, backs facing camera. You could have the same shot, but we see the backs of Anakin and Palpatine instead. So Anakin interprets that as him bringing peace to the galaxy through military power. Stuff like that.
Anyway, not really sure what imagery you could use. It could be even simpler than that. Just picking a few existing shots and laying the right pre-existing lines underneath it.