It's Jeff speciality match like others have explained similar to Cena/I Quit, Cactus Jack/Falls Count Anywhere, Team 3D/Tables, etc. When he made that announcement I said to myself, "I have to see this!" So it worked.
More or less.
The fact it's a match type which Jeff is more comfortable with, there's been more solid build with a clearer dynamic between Aries and Hardy, not to mention Aries being consistently good-great with his PPV matches this year means this has all the tools to be better than the BFG main event, which wasn't exactly a bad match either.