The infinity sign was a nice touch. The hidden history of that symbol in the show's poster art is actually very interesting. Apparently, if the infinity sign is there, it's a secret symbol that the show's authors have given their blessing to the production (usually if it's a major company, or some kind of re-envisioning that Jim Rado wanted to see). If there's an Arabic numeral "1" at the end of the title, it's usually one produced by Michael Butler, the show's original producer on Broadway.