With the World Games about to start, here's my tier lists of the sports/disciplines most deserving to be included at the Olympics. This was constructed using the following criteria: Number of active nations participating, cost to host, and uniqueness. There is no order within tiers.
S Tier
Karate
A Tier
Billiards
Dancesport
Orienteering
Roller sports (Road speed skating)
Squash
B Tier
Archery (Compound)
Boules (Petanque)
Gymnastics (Acrobatic)
Gymnastics (Aerobic)
Gymnastics (Trampoline)
Lifesaving
Roller sports (Track speed skating)
Sport Climbing (Speed Lane)
Triathlon (Duathlon)
Waterskiing (Wakeboarding)
C Tier
Air Sports (Drone Racing)
Archery (Field)
Boules (Lyonnaise)
Floorball
Flying disc (Disc golf)
Flying disc (Ultimate)
Gymnastics (Parkour)
Handball (Beach)
Ju-jitsu
Kickboxing
Korfball (Indoor)
Muaythai
Powerboating
Racquetball
Roller sports (Freestyle inline skating)
Roller sports (Inline hockey)
Sambo
Softball
Tug of War
Underwater sports
Wushu
D Tier
American Football (Flag football)
Canoeing (Canoe marathon)
Canoeing (Canoe polo)
Canoeing (Dragon boat)
Cheerleading
Fistball
Korfball (Beach)
Lacrosse (Sixes)
Powerlifting (Classic)
Powerlifting (Equipped)
- Karate was easily the top tier sport, it is widely practiced with an excellent world distribution and can be held at a generic indoor venue. It did lose a bit in uniqueness as it competes with the already included combat sports.
- Dancesport checked enough boxes to be considered A tier. I know people are still having nightmares about Breaking, but if Latin and Standard were also included the sport may have stuck around.
- I was surprised to see Billiards rank so high, but it would be a very relatively cheap, unique sport to host. It currently has enough nations competing, but would probably like more.
- Disciplines of sports which are included in the Olympics obviously took a uniqueness penalty which have cost most of them a tier
- Softball in C Tier may surprise some people, but the sport being very expensive to host and the men's world distribution being a lot lower than men's baseball pushed it down.