The new versionHistory JSP can be found here -
/libs/cq/gui/components/coral/common/admin/timeline/events/version/version.jsp
The preview button invokes
com.day.cq.wcm.core.impl.servlets.VersionPreviewServlet in AEM. 1673
TIMER_START{ResourceResolution} 1882 TIMER_END{208,ResourceResolution}
URI=/mnt/overlay/wcm/core/content/sites/versionhistory/_jcr_content.txt
resolves to Resource=MergedResource
[path=/mnt/overlay/wcm/core/content/sites/versionhistory/jcr:content,
resources=[/libs/wcm/core/con...