Google clearly knows how to have a lot of fun with their April Fools jokes, as you can see by their demo video for Google Maps “Treasure” option: http://www.youtube.com/watch?v=_qFFHC0eIUc
In all seriousness however this would be a cool thing for a team to develop to engage fans. A team like the Miami Marlins for instance, that continually struggle with ticket sales (http://www.sportsnetworker.com/2013/03/07/miami-marlins-offering-buy-one-get-one-free-ticket-promotion/), could really benefit from a promotion run via Google Maps treasure. Having a treasure hunt for a bigger prize for those that purchase tickets to certain games could be a motivating factor in getting tickets sold, and for fans to interact in/with the new ball park.
