I don't think dism offers an easy way to provide a progress bar as ImageX can do. It may require a function to read the output file and show it then, but nothing easy. I might be wrong.
Maybe it won't suit your purpose, but why don't you try to use the "LANDESK ImageW V2" (From Teradata actually) we provide to capture & deploy the images? It will provide a full screen with the progress bar.
If you really need to use dism for whatever reasons and then show a progress bar, you will need to create an Enhancement Request on our platform, but it may be available in future versions, not in the short term.