His Peter Parker is clearly being set up as a major MCU player, so it would have been weird if a sequel wasn’t ordered.
Once we see Spider-Man battle Vulture and other baddies next summer, then a sequel will sound more appealing.
All this being said, since Spider-Man: Homecoming is still seven months away from release, it’s hard to get excited about a sequel when we haven’t even chewed on the first movie.
Plus, Tom Holland was one of the shining players in Captain America: Civil War, even though his screen time was limited compared to the other major players.