People being demanding without knowing what the console is called in their own region lol. Take your time SEGA, themes aren't the biggest priority.

EDIT: spoke too soon, hope for a miku theme, with the release of Mirai DX

I want the dreamcast theme! 

Would it be that horrible for people in one region to have the option to have a different region's version?
I'm sure there are some North American people that want the Mega Drive version and some Europeans that want a Genesis version.

That being said, I don't really have an interest in the Sega system themes...