Indeed, in Germany efforts have been started to create a new Tentative List. The current T List will be completed in 2018 (maybe earlier, if not all candidates submit an application). The procedure in Germany is a rather complicated two-step process, because the responsibility for cultural affairs lies with the federated states ("Bundesländer"). First, each of the 16 states is requested to suggest two potential sites until August 2012. So we'll get a preliminary list of 32 candidates, probably less, because not all states will suggest two sites. Second, the preliminary list will be evaluated by an expert committee and the final Tentative List will be available probably in 2014 or 2015.
In Bavaria, the internal deadline has already passed and 13 sites have submitted a preliminary application. I think it's no surprise that the Castles of Ludwig II are among the aspirants, but I admit that I don't like the Neuschwanstein Castle, it always reminds me of a wedding cake.
But I like the idea of the Nuremberg Trial Courtroom. Since November 2010, the courtroom is open for visitors, if there is no trial (it is still in use as a courtroom). There is also an excellent exhibition on the Nuremberg trials.
Except for the courtroom the Bavarian list is rather boring, mainly abbeys/cathedrals/historic town centres.
During the last weeks I've picked up some information on the efforts in other German states, mainly from websites of local newspapers (Google is a good friend :-)). More than 40 candidates are discussed. As expected, many historic town centres, abbeys and castles are suggested, but there are also interesting candidates: industrial heritage, Jewish heritage, 20th Century architecture. I'll try to update my information and post a complete list