Those aren't new threats as much as refreshed ideas painted over using Abeir as a basis. Abolethic conflicts have been covered before in FR. Undead besieging the world, also been done. God like power seeking complete control, been over done. Granted they're a start, but not really different than what is already going on. Not to mention at least two have competing factions already on Toril to some extent. By something new I mean I'd like to have seen something completely new and different for a change. How about an invasion by Abeir? Or place the Realms in all out war? God forbid they actually kill off major gods of intrigue and introduce something completely new; I mean Bane and Cyric have been around forever. Kill them both and let's see Mask step up and cause some headaches or even a brand spanking new god we've never heard of. Primordials are a start, but to destructive and to the point; you really need a god so there’s intrigue. How about a new evil race for everyone to fall in love with?
Actually now that I think about it, what's really missing from the FR book is that underlying threat which pervaded throughout past editions. When you read through the books in the past every region description tended to have one thing in common; a common enemy. I mean Bane was a threat to everyone, the Dragon Cult were a threat to everyone, the Red Wizards were a threat, Zhents where a threat, and so on. You don’t get that in this book. I’ve read region descriptions that really don’t have anything going on which connects them to everyone else. Oh so and so keeps trying to invade everyone, but they can’t invade 10 countries over until they finish the nine in between. The threat section is kind of bland, nothing jumps out at you as the dominate threat. I mean a threat which causes everyone to stop their bickering and join together and fight against it. That’s the missing element. In the past you could pick a faction (i.e. Red Wizards, Zhents) to be your overall bad guy and without having to do research you knew they had some kind of investment in every corner of the world. Not any more, threats aren’t completely global unless the DM wants them to be and wants to create the story. That’s what I’m really talking about and really want; for WotC to have detailed a threat to the point it jumps out and screams “everybody hates us so we’re going to kill them or make them our slaves.” A new threat which doesn’t leave any doubt in anyone’s mind by the way the book is written; these guys are truly the threat everyone wants to fight. A threat that begs the PCs to try and ignore it.