Battleground.cpp
===========================
sBattlegroundMgr->BuildBattlegroundStatusPacket(&status, this, queueSlot, STATUS_IN_PROGRESS, 0, GetStartTime(), GetArenaType());
plr->GetSession()->SendPacket(&status);

plr->RemoveAurasDueToSpell(SPELL_ARENA_PREPARATION);
+plr->RemoveAura(57724);
+plr->RemoveAura(57723);
plr->ResetAllPowers();