While I disagree with the notion that the helmet needed captain WINGS out of all things, I do think it
would look even better if it had a different shape.
I know you like using this shape - a lot

- but especially taking the drawing into consideration
I would argue that a different, new shape might upgrade the model.
Alternatively the existing shape could be improved by making the visor smaller or even very very
small - as in just enough space to see the eyes, maybe have the rest be "blackened" by shadows?
I think that a smaller visor for the helmet could be a neat idea for several of your models using the helmet.
While maybe "dehumanizing" the model it could make it more intimidating in my opinion.