are there any plans to integrate Yahoo Maps in a later version of Oracle Maps again?
No. Yahoo Maps is no the same as HERE maps, i.e. HERE (Nokia) is the mapping service for Yahoo Maps.
HERE Maps is supported.
Thank you for the information.
Last year I saw a NAVTEQ car in South-East of Germany (this) and
was able to speak with the driver and since I know that NAVTEQ belongs to Nokia.