Can oracle dbca template be used cross versions
The information in templates includes database options, initialization parameters, and storage attributes. I use scripts instead, but from what I can see in $ORACLE_HOME/assistants/dbca/templates they are XML files which should translate to the creation of your CREATE DATABASE statement as well as init.ora which hasn't changed between 12.1 and 12.2 apart from a few deprecated parameters.

I would imagine it's not downward compatible to 11g, but there's no harm in trying?