Make Minecraft's Experimental Warning Screen Editable

[Jetpack-Cat]

I would like to be able to remove the text that appears on the experimental warning screen, to add in a story screen, as this screen shows after you click the create button on the world creation screen, and just before the world creation starts, and it only appears when you first create the world which would be a nice time to add in a "pre-story" bit that gives some lore. Once the player loads in I use custom GUIS to show some story screens before the player starts.