Vaughan back on the field

http://content-usa.cricinfo.com/australia/content/story/270279.html
Could he make an appearance in a test match this series????
doubt he would be fully fit but could help the poms in the 4th or 5th tests if they are still in it?
Could he make an appearance in a test match this series????
doubt he would be fully fit but could help the poms in the 4th or 5th tests if they are still in it?