I think so, Jaffe said TM:Black will be available for the first print out/copies of the game, since you pre-ordered it might be included 'cause yours is from the first batch of the game..I ain't sure though, this is just a hunch. XD
Here is what David Jaffe replied to a dude in the Playstation Blog: "Pre-order or not, however you acquire your game, my understanding is the FIRST PRESS of the game (be it 50,000 units or 5,000,000 units…I really have no idea) will have the voucher inside for TMB. The hope is the game is a big enough hit that stores sell thru their inventory and order more. In that case, we'll print more BUT those new versions will not contain TMB. Does that make sense/help?"
So most of us (pre-order or not) will get a free TM:Black download code! Hurray! XD