The five major sports for the 2028 Los Angeles Olympics are:
Baseball, cricket, flag football, lacrosse, and squash
Of these, I'm most optimistic about baseball's internationalization. It's the best spectator sport in stadiums and boasts the most sophisticated and rich statistical data. Furthermore, East Asians can actually reach world-class baseball (unlike soccer).
The Chinese Baseball League (mainland China), established in the early 2000s, was premature and likely won't be truly effective until 2030.