Here are some further informations, i found in german HZ-forum about the new Hero-Hideout and found useful:
Tomorrows update will start early at 7 am german time and take about 3 hours.
The hideout will replace the work. An advantage of the hideout: you can do it parallell to missions.
The HZ-hideout is about building rooms, collecting ressources and coins and (maybe) stealing some from others But you can put your ressources into storage, where nobody can steal them. You need to expand the storage and maybe your defense.
For Expansion you need coins and ressources. You can fasten the expansion with donuts. But not endless: you need to wait, until you get new resources in your rooms, until you can go on expanding.
There is a room, where one can get XP and this XPs will count in tournament.
I hope it will help and it's my understanding of topics in german forum. I tried to sum up the answers of the moderator, which i considered to be interesting. No guarantee that i get everything right
Have fun
Sabi