Patch 5.5.0 was only ever a rumor, but was still a possibility according to Dave Kosak, in order to have a restored Orgrimmar appear before the next expansion. However, toward the end of the Mists of Pandaria expansion, indicators from official blogs suggested the next patch would be Patch 6.0.0.
It was suggested that Patch 5.5.0 was 'canceled'. However, the pre-Warlords of Draenor patch (6.0.2) was eventually released instead, with the intention of bridging the gap between Mists of Pandaria and Warlords of Draenor.
- ^ @DaveKosak 2013-07-17. @Leviathonlx Most of Orgrimmar permanent changes will happen in a future patch, but before next expansion.. Twitter.
- ^ Blizzard Entertainment 2014-05-06. Siege of Orgrimmar Changes in Patch 6.0 and Warlords of Draenor. Official World of Warcraft Game Site (US). In the upcoming Patch 6.0, the pre-expansion “systems” update planned to go live in the weeks leading up to Warlords of Draenor’s release...
Blizzard Entertainment 2014-05-06. Siege of Orgrimmar Changes in Patch 6.0 and Warlords of Draenor. Official World of Warcraft Game Site (EU).