debeWedoo
the name is written as spoken, so it sounds friendly and human, saying: "we do it together"

Solution

the name is written as spoken - so the DB is in a way part and not part of the name at the same time. It´s a name that doesn´t exist yet but still is easily understood. It sounds friendly and unusual in the context of corporate communications, more like Frank Sinatra (doo-bee-doo-bee-doo :-) The subtitle "Your Deutsche Bahn Open Mind Lab" gives some more detailed explanation but may only be necessary in some cases. (The layout is a rough version and will get some fine-tuning at the end)