Extend Designer generation capabilities using Oracle Designer Extension Builder (ODEB). Generate the source code of your choice from the Designer metadata based on user-defined templates. ODEB also provides a way to export solutions (Driver, associated Templates, Parameters, Tokens) which can be then imported back to a ODEB schema providing a way for people to share their solutions with others in the ODEB user community.
Will this be a competitor for CodeGen? Maybe, if you’re using Designer anyway then it could be. If you’re not using Designer (yet) then I think CodeGen is your best shot at generating code.