I know they are always adding new troops and portraits to go along with them linked to events but there are a lot of older existing troops and spell icons I personally would like to see as purchasable options for portraits. I will share a few of my personal favourites I would like to see feel free to add any yourselves.
Of course I have a style I prefer we all do but these are the pieces of art that speak to me and would love a chance to throw my gems at them or earn them in an event in the future. The art already exists and can be easily monetized so should be possible.