Five local authority areas – Wrexham, Swansea, Merthyr Tydfil, Newport and Cardiff – were invited to develop their plans further.
Gwahoddwyd pum ardal awdurdod lleol – Wrecsam, Abertawe, Merthyr Tudful, Casnewydd a Chaerdydd – i ddatblygu eu cynlluniau ymhellach.