While all new materials created should not contain your likeness, I do think it fair to use your image if it was part of a group shot that waws printed prior to your departure. I had this happen with a couple girls who left my troupe; we had a gorgous troupe photo taken of the 13 of us, and I used it on the back of our business cards. I paid to have 1000 cards printed up and I will continue to use these cards until they are gone. Just becuase someone decides to leave doesnot mean my troupe should have to go through the expense of getting new photos done, and new cards printed up, but once those cards are used up, they yes, a new photo should be used. But that group image has been replaced on our website (left up as a reminder of some really great times, but no longer used on our front page of our website) and the image is not used in new promotional materials either.

And if it is a solo image of you, it definitely should not be used for a troupe you are a part of. But group shots are something else....and should be phased out as it is convenient for the troupe.