Yes Hotel Tango, that is what i have been told. There is a new press release available on CAPA detailing the whole situation.
CAPA - Germanwings
Eurowings aircraft to be wet-leased to Germanwings to operate the currently operated Eurowings routes from 2015 onwards. In the meantime, i.e. until then, all DUS originating services are to be operated by GermanWings, effective from the 30th March 2014.