Right now you are able to open a list of Blogs (e.g. Community Blogs).
If there are images posted in a blog, you have to first open this blog to be able to see them.
(there are already descriptions in the overview for the title and the first few lines)
A teaser image would be a nice upgrade, so customers are able to see, what this blog contains.
In the screenshots you can see, how it is configured right now.
The second screenshot is an idea how it may look like.