If you're planning to change things that much, Rafael, IMO it might be a good idea to produce not one netbook, but a
pair of them. For the traditionalists, a Gaz could be compiled describing the Shadowlands, circa 761 -- the time of the Arthaus and FoS books -- that sticks with "canon" information to date. This book would use the 3.5 version of the rules, so people who enjoy the setting as Arthaus described it will have a place to turn.
At the same time, you and others who'd like to make Ravenloft more 4E-compatible could create a companion-volume on the Shadowlands of 771 (or even later? post-ToUD, maybe?) BC. In that one, you can deviate from "canon" more freely, by saying that in the intervening years Elena has forfeited her darklordship to the statue, the
Castle of the Undead domain has joined the Cluster, Morgoroth is out of the picture (dead, supplanted, maybe even redeemed as he'd once hoped), etc.
DMs who like the "Future Shadowlands", but currently set their campaigns in the 760s or earlier, can arrange for history to unfold in that direction ITC, with the players' characters as witnesses. Others who don't agree with the course you've set can call it an "alternate future", or perhaps a grim prophecy which their PCs must work to avert.
Oh, and I'd be flattered to have a narrator named for me, Raf. Just don't beat her up as badly as I'd trashed Viktor (with Joel's permission, I swear!) in the
NS Gaz, okay?

"Who [u]cares[/u] what the Dark Powers are? They're [i]bastards![/i] That's all I need to know of them." -- Crow