The new fragrance, by perfumer Jacques Polge, will retain the "original honeysuckle accord" and add magnolia. I will update with more detailed information when I can find it.
Chanel Cristalle Eau Verte will be available in 100 ml Eau de Toilette. (via cosmeticnews)
Update: additional notes include lemon, bergamot, neroli, jasmine, and white flowers. (via glamourparis)
Another update: see a review of Chanel Cristalle Eau Verte.