Thriller has been released so many times since it came out, it was rereleased when invincible cam out and etc.

like when the emancipaction of mimi ultraplatinum edition came out it was counted as the same album thats always been done you have to have over a certain amount of new material to be considered a new album instead of a rerelease.

I think of you have to have over like 6 new songs for it to be considered a new album, if not it will be considered a rerelease of the old version and the sales will go to that album.