Has anyone worked on or is aware of some possible solutions to convert/migrate a Nintex workflow 2010 into a SharePoint workflow 2010?
Any thoughts would help.
You mean to use a workflow that was created using Nintex in a SharePoint farm that does not have Nintex installed?
This will not be possible as Nintex uses many unique components such as workflow actions that are not available in SharePoint 2010 by default.
Also there is no process to convert Nintex Workflow to SharePoint Designer Workflows for the same reason.