Answer
To get the most recently "released" item, you can use the sorttype parameter to sort by `properties.releasedate`. You can alternatively use created_at to sort by the Item you most recently added to the Admin.
{%- include 'module', id: '3', layout: 'default', per_page: 1, sort_type: 'properties.release_date', sort_order: 'asc' -%}
Then just output one post- to get the first Item. To do this, set per_page to 1.
Use the sort_order to control whether you get the first or last item. To get the latest Item by date, the date will have a higher value, so use 'desc' (starts with highest number) rather then 'asc' .