That makes some sense. If the EU wants to present a new proposal, then a new referendum is appropriate. But I don't know if it is possible for the unelected European elites to agree on a new treaty again, particularly with the addition of the Eastern Europeans and (cue Darth Vader theme) the Turks.
The interesting thing about this is that in France apparantly, the EU constitution is seen as an "Anglo-Saxon plot to export croissants from Tesco and populate the Trois Vallées with ski instructors from Surbiton", while here in the UK it's regarded as a Franco-German led left wing socialists charter.
Funny old world eh?