Hi, until i was leveling i had -It's All Fun and Games- quest but i couldn't do it, soo i deleted the quest and some months that I didn't know nothing about it. After i reached max lvl i realized that i need that quest to unlock the Ebon Blade Quartermaster but when i go to the ship to take the quest, doesn't appears me anymore, WHAT CAN I DO ?
Check the bugtracker for the bug here and upvote it: https://www.warmane.com/bugtracker
You can also try opening an in-game ticket and see if a GM can help you restart the quest.
I did neither of these requirements fully, and was able to pick Preparations of War and continue to Ebon Blade questline two months back. Only requirements I met was CWF and level requirement. May have gained reputation with Ebon Blade from Zul'Drak quests before level 77 and going to pick Preparations of War.
So Wrathgate quests, and Argent Vanguard quests at Icecrown doesn't seem to be necessary.