It would have been great to have seen sample layouts for one of the more major characters, to see if the main characters would have more pages (since there's a lot more to write about Kermit, Miss Piggy, Fozzie, and so on than there is about the characters in these sample pages).
So it looks like some character pages will have Statler and Waldorf making comments about the characters or pages. Not sure how I feel about this. It's space that could be used for more facts or pictures.
Even though these are mock-ups, I can't help but think that the characters paired on the two-page spreads are final. And with it being alphabetical order, it looks like Angelo will be missing (he should come between Angel Marie and Angus McGonacle). I think somebody on the Toughpigs forum said they'd have to tear out that part, but it looks like that member will get to keep the whole book. Unless the mock-up people just took random pages and put them together implying two-page spreads. Or if, considering many of the images come from the Henson Archives, they're mainly doing characters from when Henson owned the Muppets (plus Walter and the Muppets Most Wanted characters). Or if he is in there but they didn't include the section here out of fear that fans wouldn't buy it if they knew he was in the book (I doubt that).
So it was said that this book will have 200 pages. Each character will have a page, so it'll be close to 200 characters, unless some of the more major characters get multiple pages. But then there'll probably be an introduction chapter and/or forward. Maybe also an index (though with them all in alphabetical order an index would be redundant).
When the book is completed and closer to its release date I sure hope that we get some sample pages as they will be released (and not mock-ups).