bbPress.org

If you want a specific view to have images, you would need to create a custom view template called either single-view-recent-with-topic-image.php or view-recent-with-topic-image.php and most of the code would be based on the single-view.php template in the extras folder in the bbPress plugin, you would have to make it custom enough to include the featured image code, and I guess however your users will be able to select a featured image during topic creation.