It's very unlikely the Marlins keep everyone next year. I figure Nick Johnson and Uggla will be gone due to salary. Boni and Herm will be gone due to performance. This is what I expect to see next season.
2B - Couglan
SS - Hanley
OF- Ross, Maybin, and BC
UTIL- Gaby Sanchez, Helms, Alfredo Amez
Not sure about the pitching. The Fish have a tendency to trade starting pitching. Hopefully at least JJ and Ricky stay.