I posed the same question either in this forum or on the main wondering if there will be multiple releases. Like the deluxe YATQ and the Platinum,, and there was a "vinyl replica" CD edition thing also.
I am considering waiting until after it is released to buy ROTT. I am not a completist, but I do buy the singles and the albums, so if one "album" has more content than the other, I will buy the one with more.
Also, I will not buy it from Amazon, at least not pre-order it from them anyway, because in the past when I have, I always receive it a week or so after the release date. I think they mail it out on the release day. I would rather spend a few dollars more and get it when I want it rather that wait until they decide to send it to me.