A subtle but telling sentence we just stumbled across in one of the EU Commission's glossy promotional pamphlets:
"The institutional process of updating the rules governing the relations between the member countries and the EU and between the EU and its citizens will continue. The issue of the Constitutional Treaty will be at the forefront of discussions in the years to come, regardless of the form and content of any text that will eventually be adopted."
Bear in mind that this was written in 2006, after the French and Dutch 'no' votes to the EU Constitution.
Another to add to the list of official admissions that the Lisbon Treaty is just a badly disguised version of the original Constitution.