If the Olympics can support rhythmic gymnastics, air rifle marksmanship, and speed-walking, there are some events that I think should be added to the lineup.
1) Tug Of War
The ultimate team sport, this used to be an Olympic event up until the 1920's.
2) Mixed pairs synchronized swimming
If there is mixed pairs in figure skating, tennis, and whatever else is currently an Olympic sport, there is no reason for there to not be men in synchronized swimming. And with all the men who perform in Cirque du Soleil water shows swimming around, obviously there are enough men who can compete like this. Other levels of competition have competitions with men; see Italy here in the World Synchronized Swimming Championships.
Olympics has a competition for air rifles. Translation: bb guns. If they have bb guns, and skeet shooting, and archery, etc., they can have medals for darts.
There are already numerous horse riding sports in the Olympics, and they are mostly technical competitions. Imagine teams of polo players thundering around the stadium. That would be awesome. And polo is a real sport!
Chess is the most intense of any competition. This one is a stretch for the Olympics, but imagine awarding an Olympic gold medal to a chess champion. And it would allow more countries a chance to win--in this age of hi-tech training, the only chance most countries have to earn a medal is if they have athletes who have the money to train someplace like the U.S. But chess can be learned and practiced anywhere. Anyone has a shot. That's what the Olympics are supposed to be about.