Lord of the Rings was your comparison! I think Wizards is handling it smarter in many ways, and I expect things to improve with the merging of the game and book teams. Still, more one-shot things have been blown in WotC's two timeline years (bodily return of Netherese and Sammaster etc. etc., Rage of Dragons, destruction of Elminster's Tower, revival of Cormanthor) than is wise for the long-term health of the setting, plausible, or sustainable. They know these arguments and decide to keep with the bang bang, though most of the fiction is relatively small-scale.
Back to these modules. The promo copy is sensational and exploitative, which promo copy often is. It seems to be getting people's attention, for whatever reasons. I suspect they're not the use of publishing resources I'd prefer. I'm sure they'll be well-produced, interesting, lore-consistent and they'll probably be good scenarios overall. We'll wait and see.