Of these I'm only really comfortable with Skateboarding and perhaps Baseball/Softball if they add two more teams.
Combined climbing is a worse format than three separate events, surfing is stupid costly away from good natural venues and doesn't translate well on TV and Karate is incredibly boring (except for team kata, which isn't even proposed).
At least adding Skateboarding would be a bold statement and it's a cheap sport to host. Vert as a third event would be nice.