The ranks have been posted to Halopedia, no need for guessing and speculation.
http://halo.wikia.com/wiki/Rank_%28Halo%3A_Reach_Game_Rank%29
There is no DLC coming on the 15th, it's just the second Matchmaking update. They've not announced at all when the current Rank cap is getting lifted.[/QUOTE
So it is, sorry I read multiple update on bungie at once and combined it to think the cap and dlc was coming on the 15th.