10g or 11g is not a product, it is a marketing label. There is database 11g, forms 11g, discoverer 11g,.......
If 12c is the new marketing label for oracle products asking "I want informations about 12c" is like asking "I want informations about the features of car".
As for when forms or database 12 (whatever letter it has) is released and what features will be included: typically oracle does not provide exact dates about when brandnew versions of their products are released, and what exact features they will include for sure. But basing the fact that the latest 11g versions of forms and the database have been released recently this might take some time.