Venues will be announced next month. All four first-round games will be played outside of the United States this time. The Tokyo Dome and the Rogers Centre are two likely venues. Hiram Bithorn Stadium in San Juan, Puerto Rico was also used in the last tournament. Presumably a stadium in the Dominican Republic would be used. I woudn't count on Caracas hosting any games. Or Havana.
The field is expected to increase to 24 nations for 2013.