I can bet (though it's guess only) that UIPM tries once more with the mixed relay.
On the other hand - I guess fencing, tennis and badminton have no more events to be included. Adding to that all the team sports - basketball, football, volleyball, field hockey, handball, rugby - we've got eight. I don't count waterpolo as being under FINA it might mean changes in swimming and/or artistic swimming programme. Still, this means at least one of the team sports proposing changes. Beach handball, futsal or beach soccer and deleting basket 5x5 are all my first thought, hockey5s and rugby union rather not.
OK, let's see the possibilities one by one:
Aquatics - swimming and/or artistic swimming
Athletics - it can be anything, I'm afraid
Archery - compound (?)
Badminton - nothing, I think
Basketball - deleting 5x5
Boxing - weight changes again (#genderequality)
Canoeing - any distance/boat size change
Cycling - changes in track programme according to the new format, maybe some team road races
Equestrian - hopefully driving, not unmeasurable vaulting and reigning or horse-harming endurance.
Fencing - nothing more to be added, I think (although the team event known from YOG...)
Field hockey - Hockey 5s possible, but not likely
Football - beach soccer or futsal instead of U23
Golf - mixed relay? haha, just kidding (I hope)
Gymnastics - team trampoline, men's rhytmic (#genderequality)
Handball - beach handball
Judo - weight changes
Modern pentathlon - mixed relay - this time #yesplease
Rowing - so many events to be in or out, including deleting of lightweight
Rugby - union instead of sevens not likely due to reducing number of athletes
Sailing - have there ever been two consecutive Olympics with the same classes?
Shooting - team events, more mixed events... Gene Simmons from KISS, Alice Cooper's scenic shows and music video to Michael Jackson's "Thriller" were alltogether less scary than what can be done here
Table tennis - men's and women's doubles
Taekwondo - weight changes
Tennis - nothing, hopefully (separate tournament on clay and grass?)
Triathlon - sprint distance as a second individual event - I'm in as there may be that "more events with the same athletes and infrastructure"
Volleyball - nothing, I think
Weightlifting - weight changes (again!) or... separate event for those who do not dope (only one as I think there's very few of them)
Wrestling - beach wrestling, grappling, pankration... or simply deleting Greco-Roman (#genderequality)