Got my hand on the other 2 titles and both of em seem to progress to the title screen without the black screen issue at all, however i'm noticing another regression keeping those 2 titles from being considered playable. ...
Latest proton Experimental update fixed it, game now displays perfectly fine. Might be worth testing the other 2 exceed titles now too, considering protondb mentions similar issues for the both of em and Vampire rex is u...
Testing further, I can confirm that manually forcing proton to 3.16-9 makes the screen appear normally (but started acting like i was holding up the entire time through the menu until i switched to a different controller...