My analysis.
Baseball
POSITIVES - One of the biggest sports in the host country, will require no new facilities, might attract big crowds live, A US Olympics might persuade MLB to allow players to compete
NEGATIVES - Little interest outside a few parts of the world (North America, parts of Central and South America and East Asia), If MLB doesn't allow their players to go the Olympics then the competition will be the lowest quality of any Olympic sport. Will take a lot of quota places
Flag Football
POSITIVES - A variation of one of the biggest sports in the host country, will require no new facilities, might attract big crowds live. A US Olympics might persuade the NFL to allow players to compete
NEGATIVES - Little interest outside the USA, the USA will win easily, unlike Rugby Sevens it's not established as a serious sport. Will take a lot of quota places
Breaking -
POSITIVES - Got to be in with the street culture, dude. It's quite fun to watch
NEGATIVES - There is no subjective way of judging the "sport". Is it even a sport?
Cricket
POSITIVES - India is the last important country in the world where Olympic TV rights are undervalued. Mr.Bach likes Rupees.
NEGATIVES - Will need new facilities. Cricket is only played well in about 25 countries around the world. Will take a lot of quota places
Lacrosse
POSITIVES - Popular in North America. Exciting to watch.
NEGATIVES - Only a handful of countries are competitive. Will take a lot of quota places
Karate and Kickboxing
POSITIVES - Widespread competition around the world
NEGATIVES - Too many similar combat sports in the Olympics.
E-Karting
POSITIVES - There must be some?
NEGATIVES - Does motorsport belong in the Olympics anyway?