Hi
Did you check the Content fragment ?
In AEM 6.2, you can use content fragments that let you create original content in AEM, enabling copy writers to create editorial content before it is being authored in a page and to further allow curating such content by creating channel specific variations and by associating collections with relevant media content. As a result, web producers receive content that is prepared and "ready to go”, enabling them to focus on assembling content across channels, globally and on a local level.
We have Helpx article created to tell how to use it :- https://helpx.adobe.com/experience-manager/using/content-fragments.html
Documentation :- https://docs.adobe.com/docs/en/aem/6-2/author/page-authoring/content-fragments.html
I hope this will be something that is closest available option as of now.
Thanks and Regards
Kautuk Sahni