Lately we have been receiving new information about this game, as featuring online multiplayer and local play, possibly future DLC and in this week we still will know more info about it thanks to IGN.
Everyday I search new info about this game and try to imagine how it will be, and watching some trailers I noticed that the ghost dog could have a most important role in the game that we still dont know. But until we wont get the game (or Gamexplain dont spoil it to us), we only can speculate.
Well, about the pic, I draw that dog being the new member (or pet) of the ghostbusting team led by professor E.Gadd, just like the original ghostbusters movies. He could help Luigi with the ghosts enemies or with the puzzles or whatever.That would be cool, dont you think?!^^
Ok, hope you like it!