Whitaker vs Mayweather would be mine as a think they would both be no worse the wear after 15 rounds and it ends in a draw - but few fans would notice as they fell alseep around round 8. Match ups you would rather never see. Any others?
Not sure if they were ATG`s, but still former worldchampions: John Ruiz vs. Henry Akinwande would be a matchup.
They would hold so much- after the 12th round the ref would pronounce them man and wife and tell them to get a room next time.