Three podcasts discuss what to expect when working with a publisher:

http://www.buildingthegamepodcast.com/2018/01/21/episode-295-robs-gone-and-the-worst-guest-ever/

http://www.boardgamedesignlab.com/how-a-publisher-develops-games-with-alan-emrich/

http://thegamecrafter.libsyn.com/a-publisher-perspective-with-chris-leder-and-the-game-crafter-episode-159