Majoru Oakheart
Adventurer
The product description pretty much rules out that we'll get an actual module as opposed to a loose collection of challenges. The product's level range (10 to 22??) already precludes a tighter design, unless this product overhauls the dogma of only throwing level appropriate encounters at the PCs. I mean, I'd hope so, but let's not get carried away. I think comparisons to 4E's own Dungeon Delve or 3E's Book of Challenges hit the mark pretty well of what we can reasonably expect. And yes, one can realistically "weave a campaign around" the challenges in these books.
Yeah, the impression I get is that there are a number of adventures(probably 5 or 6) that are fairly short in this book. Each adventure can be used individually or can be strung together to form a campaign without the details between them filled in.
For instance, you might find out when you are level 10 that there is something inside the Tomb that you require in order to stop the BBEG, so you go to it and find the item, but part of the dungeon is collapsed with no way past.
Then, when you are level 15, you find out that there is another dungeon created by Acerak which contains something else you need and you go to that.
Then at 20, you are told that you need to find something else that is deeper into the original dungeon and you are given some magical method of clearing the rubble and you go deeper in and defeat the BBEG.
Each of the adventures can be played on their own, or they can be combined together along with adventures of your own design to fill in the gaps.
I don't get the impression that it is simply a bunch of encounters, however. I would have liked to have seen a mega-dungeon for this product though.