Frelorn announced today during his weekly Twitch stream that the target launch date for U18.2 (and the raid) will be June 28th.

In addition to the raid there will be more housing hooks available, changes to some classes, and new Instances of the Week.

Read more here: https://www.lotro.com/forums/showthread.php?633476-Update-18-2-Beta-1-Release-Notes-amp-Known-Issues-PRELIMINARY-AND-NON-FINAL-BULLROARER-ONLY&p=7614022#post7614022