The release of Minecraft 1.9 is on thursday. Spigot says on their website that they will release a 1.9 version on friday. So if everything goes right we will upgrade on friday night. All servers hosted on the UnityCraft.de Server will have the 1.9 version available at the same time as UnityCraft.
We don’t know yet if we will reset the map. It depends on the patchnotes.
Here a link to the Spigot post: https://www.spigotmc.org/threads/minecraft-1-9-more-info.124273/