The bonus appearance armor for Sentinel's Fate was revealed yesterday on the EQII forums.  The Guarding of the Reasoned comes with the retail boxes and the Guarding of the Learned with the digital downloads.

Also released was a video of the Collector's Edition mount choices.  It was recently confirmed that the Highland Stalker-style mounts will only be available with the collector's edition.  See whe video after the jump!