Granted not every single one of those pages will be packed with information, but I have no idea how you think he meant anything other than that the Skyrim article is 12 pages long.
I can't speak for him but maybe he meant it won't be
all Skyrim, but other Elder Scrolls related stuff also. Kinda like the last article. Quotes and pictures and such, explaining the series for those you missed the last article.
Either way, I'm completely stoked, and to hear it's going to have 12 pages of interest, I'm definitely buying this issue.