Here comes the release notes...
You can also add the announcement for the release if it's already ready. If this is an incubator version, add the usual incubator disclaimer too.
Move the page up in the TOC using the arrow button in the toolbar at the upper right, so that it's the first child page under the "Documentation" page.
The page could then look like something like that:
http://incubator.apache.org/ivy/history/2.0.0-alpha-1.html