I think you could do a fair bit by following the priest and his soldiers that are chasing Wander more than the game did. He can provide exposition to the soldiers as they travel, seeing more and more pillars of light in the distance as they do so. Have some banter along the way to get us to like one or two or the soldiers as well. Play up this party’s protagonist energy.

In the meantime, let Wander talk to Dormin more. Dormin remains honest and helpful throughout the game, so I think you could easily add in concern for Wander and curioisity about why he’s doing what he is doing. “What a strange, fascinating little mortal. We do hope he knows what he’s doing.”

I suppose you could probably only show maybe three colossus fights max, including the ending. Picking which ones get done in full would be tough. First one almost certainly has to be on the list. I think the giant flying serpent in the desert is probably the best one visually, so that’d be my other pick