Curious how an established publisher gets a game from concept to store shelf? 

Asmodee shares its process in its “Making of a Game” series:

Part 1, prototype to project:
http://us.asmodee.com/ressources/articles/making-a-game-from-prototype-to-project.php 

Part 2, theme and graphics:
http://us.asmodee.com/ressources/articles/the-making-of-a-game-chapter-2-theme-and-graphics.php

Part 3, visualization to realization:
http://us.asmodee.com/ressources/articles/the-making-of-a-game-part-3-from-vision-to-realization.php

Part 4, final touches:
http://us.asmodee.com/ressources/articles/the-making-of-a-game-part-4.php