Preloading before starting scene

Is it possible to preload a scene before starting it? My problem is that none of the scene plugins and managers are instantiated before the scene is started by the scene manager. So I cannot call scene.load.start() because load is undefined. Is it possible to use the loaderplugin without any scene attached to it? Or does this not make any sense? Ultimately I want to download the assets for my next scene without specifically adding the assets to this previous scene.

Using scene’s payload feature, demo.