Various press sites got sent some bits of info and some images of the patch coming later today.
The important info here is the following bit.
Players will be able to start construction of a new back item that will grow and change as you adventure during these next two episodes. The Buried Locked Chests in Dry Top have also been updated once again to include one of three new kites: the Ventari Follower, Prosperity Mine and Crystal Shard. If the looks of these kites were not enough, these kite toys will also grant increased movement speed while players are carrying them!
You can read it from the following sites, every site basically have the same info/images
In addition, Arenanet also posted this picture puzzle from Omadd’s machine on twitter
Solved by HowellQ on reddit