I created a new project and working with eclipse (used eclipsify command).
basically, I moved the app directory from an old project to the new
According to jetbrains, the issue with templates is fixed. If you have play 2 generated source sources included in the IDEA project then you should exclude this folder from the project
http://www.jetbrains.com/idea/webhelp/configuring-folders-within-a-content-root.html
and do File | Invalidate caches and restart.
If you have an SBT project, open it in IDEA via File | Import Project | Sbt type project
Make sure to use the latest Scala and Play 2 plugins.