We have heard through various third parties that Loras Tyrell, the Knight of Flowers and a likely key player in whatever the Tyrells are planning, has been gravely wounded in battle, possibly disfigured by boiling oil.
Later on, a dead person who could be Loras is encountered by the blind Arya in the House of B&W.
The first story sounds too much like a convenient way to let Loras do some mission for the family while he's said to be "healing". The notion that he's died offscreen seems like a horrible waste of a good character. So ...what do we believe has happened to sweet Loras?