1. The facts furnished by you are conflicting. You have in the beginning stated that you got divorce in California in Dec 2014, whereas in the later part of your query you have stated that the case is at a stage where the vakalatnama has been filed by your spouse's lawyer to contest. If the vakalatnama has just been filed and the case is still pending then on what basis do you say that the divorce has been granted?
2. If the divorce has been granted by the court in California you do not need to apply to an Indian court to validate the divorce. However, if the divorce granted by the California court has been challenged in an Indian court by your spouse you should contest the case so that the judgment of California court is not derecognized by the concerned Indian court.
3. If the divorce granted in US is set aside by an Indian court it will imply that the marriage is alive and subsisting for all practical reasons.