I still don't know if it's worth it to buy Dishonored. Wait for GOTY, or not...
I also wanted to wait for a GOTY edition, but I don't think its worth the wait
IIRC there are two types of DLC for this game - Pre order bonuses that gave a boost to your abilities, and then there was the challenge maps
The second type is the real story DLC which there are two parts of, with the first one already being out
By the time the GOTY version comes you could probably get the game + 2 DLC story missions for a cheaper price then the GOTY edition
If you really want the other DLC content then wait, but I don't really care for it