The description in the MvC Best Buy product page mentions an included stool.
I see that buried in there now - they did a great job not including any pics of it.
Edit - Ok, now I see a pic! Has that been there this whole time? The stool seems kinda lame... it's just the Marvel half of the face-off art on the cab. Might have been a good opportunity to include two stools and stick the Capcom art on the other one.