How about expanding Splash.properties with new features?
Like with position of each of bars, and size of them or maybe change 'rotate' from only true/false to 0 - no rotation, 1 - rotate from right to left, 2 - rotate from left to right, and maybe rotation speed.
Or maybe since we are not allowed to change Mojang logo, we could make separate image that would be behind that logo so 'Mojang' would be always seen, is it possible?
Maybe other people on this forum have other ideas! ?