Halo 4 Specializations what happens next

I only have the regular edition of halo 4 so when I hit level 50 I only got to choose between wetworks and one other specialization. When I finish those specializations do I just have to wait for new ones to come out or will more become available to me. If no new specializations are avaible to me will it track the exp I earn and allow me to use it when the other specializations are released (similar) to the level cap in halo reach or am I just screwed for the time being?

So what will happen is there are 8 of them. Each haveing a equalivent ranking of 1-10 right now for Spartan IV but they only have 10 levels.

So each specialization has 10 levels level 1 is 1-10 in Spartan IV terms. Make sense?

I realize that and yes getting wetworks from 1-10 takes about as much exp as it took to get form 40 to 50 but what im asking is I only see wetworks and one other specialization (i cant remember the name for the life of me) I finished wetworks when I finish this next one are the other 8 specializations going to be available to me or am I going to be without a reason to play halo 4.

You have to wait till 343 give a code via email. Or so i was told. Sucks, i just hit SR70 and now won’t play until i can level up again.