Arena and Rated Battleground Season 9 is scheduled to end as early as June 28. At that point we will determine who is eligible for the end-of-season rewards, a process that should take approximately one week. It's very important for players who feel that they may be eligible for Arena titles and/or the Vicious Gladiator’s Twilight Drake to refrain from transferring their characters to another realm or faction until after Season 9 ends. During the break between seasons, all Rated Battleground and Arena matches will be unavailable.
Read more about the transition between seasons here: http://us.battle.net/wow/en/blog/2880562