How many different types are there currently and are all of the individual tokens "released" (e.g. transparent Concentrate Fire command token).

Two sets Black and red, were prizes between summer 2015 and Q1 2017.

Clear and red Q4 2017 squadrons, Q1 2018 con fire, and engineering has just been announced for Q2, I guess we will get nav Q3 which could be winter but if like last year will be Spring next year.

Looks like there was also a black/gold command token set at worlds this year:

https://www.fantasyflightgames.com/en/news/2018/3/5/medal-ceremony/