This is an interesting one. So Judo and TKD, and wrestling are allready there. Why not in 2016 when the olympics are in Brazil introduce Brazilian Jiu Jitsu ! I think it would be great, with all of the interest world wide in addition to the money generated by what we have in MMA. I think the Olympic version of BJJ is just what the sport needs to get it to the next level.
http://www.gopetition.com/petitions/allow-brazilian-jiu-jitsu-in-the-2016-olympics.html
http://www.usajj.com/jiujitsu-international/jiu-jitsu-olympics-2016.html