No. Once Dragons are in the game they will be there forever. Im sorry but im just wondering where you got this information and how sure you are that it is valid? The information has been around for a long time (since close to about when the first game informer article came out). It's pretty much everywhere. Hence why they always use the term "Infinite" when speaking about the amount of Dragons in the game. I'll take your word for it. I cant say ive come across this information however, but still, its good nonetheless. I can back him up I have heard Todd Howard say it himself, though not sure which video but I remember because it was something I was wondering myself.