Loading content after loading scene

Big scenes take some amount of load time. Therefore I want to be able to load some content after the scene is initially loaded. I have a Canvas with a "Loading..." text, and a content panel which is initially deactivated. I want to load the scene, display it to the user and then load the content. Or is the content, when disabled, also loaded on scene creation? I tried with

 public GameObject content;
 public Text loadingText;

 void OnLevelWasLoaded(int level)
 {
     StartCoroutine(Show());
 }

 IEnumerator Show()
 {
     content.SetActive(true);
     Destroy(loadingText.gameObject);
     yield return null;
 }

When testing this on a scene with a few seconds of loading time, it stays at the previous scene until the scene is completely loaded, which is NOT what I want.