Is Mayweather-Hatton one of the greatest fights of all time?

I think it is great.

It is being promoted as one of the biggests fights ever. I've never seen fans looking forward so much for a fight. As an "event", I think there is no doubt that it is one of the biggest ever.

The fight per se might not be so great. But hey, Codrington-Bika was probably the most entertaining fight this year and it is obviously not considered a "great" fight.