Basically the idea is to allow the creation of of custom cards where the input is a set of key/values; or even possibly a customizable widget of some sort (e.g. click on a map to set latitude and longitude variables). Then, there is some HTML template corresponding to the card where these values are rendered into.
The example I was thinking this would be useful in is for embedding a Google Maps. Instead of having to paste a long script with HTML and changing variables manually every time I want to embed a map, I would just have a “Google Maps” preset template card and only need to input the variable data.
Would this be a worthy contribution to Ghost?