Tom Holland plays the web-slinging hero in this summer’s “Spider-Man: Homecoming” English actor and dancer is the new Spider-Man, a high school honor student who becomes a superhero when he’s bitten by a radioactive spider. After playing the friendly neighborhood web slinger in last year’s “Captain America: Civil War,” Holland returns to tell the origin story of Peter Parker in “Spider-Man: Homecoming.” The movie opens in July.