As you probably know, Microsoft already offers a management pack for earlier versions of WebLogic. See
http://www.microsoft.com/en-us/download/details.aspx?id=29270 for the free download. We are in the process of updating this management pack to cover WegLogic 12c and should have
the update released in a couple of months -- should be in October 2013 as part of the next regular Update Rollup.
Michael Kelley, Lead Program Manager, Open Source Technology Center