Yeah, I was disappointed by that, too. It looked pretty cool and yet Zemo only wore it very briefly at a point when he didn't need to wear it. The way he reached for it in the car, it seemed like it had some kind weighty significance and yet...nothing.So, what was the significance of Zemo's mask anyway? In the end, it just feels like a gratuitous moment of comic accurate fanservice that had no relevance to the story.
I'm all for bringing in comic book imagery but it has to make some kind of in-universe sense.