Let's get real here. About 2 people in Europe care about distance events. As far as what people are going to want to watch:
Shot Put - Joe Kovacs (and Christain Cantwell, Reese Hoffa, and Ryan Whiting) vs. David Storl. It wouldn't surprise me if this is the #1 event for the Europeans, and since Kovacs has thrown this year significantly further than Storl's PB, the latter has something to prove.
Javelin - Yego against Pitkamaki. Can the Kenyan do it again?
4X100 men and women - This site claims to be the "home of distance running and track and field" and you can't mention that Monaco is the training camp for the Us relay teams. There are two US teams for men and women each competing, but the French men's team might be interesting.
Long Jump - Can anyone even get close to Bartoletta? They can probably mail her the Beijing gold right now.
Womens 200 - 17-year-old Kaylin Whitney against all of the top people save Felix. Whitney already has the Junior WR and the 4 fastest timees ever run, and she probably gets another one.
Mens 100 - With the US relay team here, this is a repeat of the US Nationals, with Gatlin, Gay, and Bromell We'll see if Bromell is cooked yet, and if Bledmon and Vicaut can hang (for sure they can't hang with Gatlin).