If there are any news about this bus, they´ll be presented here:
Current Developments - Aktuelle Entwicklungen
Marcel wrote in the comment thread that some details in the cockpit and the whole interieur of the trailer are missing. And they are still working on the physik which isn´t completely ready yet. Also they are working on the new line 5 and a big "to do" list for the main programm. So if there are news about the bus you will see them in the thread
You shouldn´t ask for a release date, we don´t know it and M+R will not answer questions like this!
and yes, it´s an articulated bus
Greets