The current season on our Mists of Pandaria realm will end on Wednesday, July 26th, 2017. We will launch the new season a week after on Wednesday, August 2nd, 2017. This will leave a week of inter-seasons.
The conquest points will be reset when the new season is set. You will have a week, with the inter-season to spend your remaining points. Titles except Gladiator seasons will be removed, and the achievements will remain.
The rewards will be distributed only to 3v3 teams. Here are the level of rewards:
1 - 15: Brutal Gladiator, http://wowhead.com/achievement=420 and the mount http://wowhead.com/item=43516. 16 to 30: Gladiator, http://wowhead.com/achievement=2091 and the mount http://wowhead.com/item=83086. 31 to 100: Duelist, http://wowhead.com/achievement=2092. 101 to 200: Rival and http://wowhead.com/achievement=2093. 201 to 300: Challenger and http://wowhead.com/achievement=2090. About rated battlegrounds, Hero of the Alliance / Hero of the Horde with the achievement http://wowhead.com/achievement=6942 / http://wowhead.com/achievement=6941 will be given to for the top 10 players in rated battlegrounds who have won at least 50 games. 
Good luck and congratulations to all participants.