The releasedate for the Aerosoft shop is planned to be somewhere in November.
Translation from the Aerosoft site (http://www.shop.aerosoft.com/eshop.php?action=article_detail&s_supplier_aid=50282&s_design=bahn&shopfilter_category=Train%20Simulation&s_language=german):
"Cologne is the largest city of the State of Nordrhein-Westfalen. Therefore, the city became an important commerce center and is Germany's traffic junction with the largest railroad traffic volume and with the largest railroad intermodal facility ("Cologne Eifeltor").
Located in the center of the metropolitan area "Rhein-Ruhr" and the central european market, Duesseldorf is one of the five most important, globally cross-linked, economic, traffic, cultural and political centers of Germany, the so-called Big Five.
Included stations:
• Köln Hbf • Köln Messe/Deutz • Köln-Buchforst • Köln-Mülheim • Köln-Stammheim • Bayerwerk
• Leverkusen Mitte • Leverkusen-Küppersteg • Leverkusen-Rheindorf • Langenfeld-Berghausen
• Düsseldorf-Hellerhof • Düsseldorf-Garath • Düsseldorf-Benrath • Düsseldorf-Reisholz • Düsseldorf-Eller Süd • Düsseldorf-Oberbilk • Düsseldorf Volksgarten • Düsseldorf Hbf"
some pics:
As this is an important commuter route, it'll come with the typical bi-level commuter coaches in DB regional red paint with cab-control car and loco.
(To avoid misunderstandings, please note that I'm not affiliated with the developer Aerosoft.)
, hope it is finished in November 
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