I've honestly hated the direction they've headed in towards channel capabilities with regards to branding. You used to be able to do so much in terms of graphics, even adding graphics to your channel name under videos.
In any case, the up and coming channel/youtube layout looks... better than the current, but is still no big change. Basically based on the average of the colors in your banner, your channel will be themed with a color. Essentially what YouTube looks like on mobile, will soon be implemented to the desktop layout. I think it's alongside a large update to Google Chrome.
I've also noticed that I never answered the question properly; I think the chances are small, but it's far from impossible. I feel like if they did, it would have to be a big step up from the old days to make them consider it. Probably through a more interactive, and less "page-y" youtube channel layout.
*throws 2 cents into the wishing well*