I did a quick search here and found nothing... so... here's a Reddit link to a mock-up METROID loading screen...
https://www.reddit.com/r/Metroid/comments/ca4thk/made_a_mock_loadingtitle_screen_for_a_metroid/ (https://www.reddit.com/r/Metroid/comments/ca4thk/made_a_mock_loadingtitle_screen_for_a_metroid/)