There is a legal answer and there is a practical answer to your question. Lets analyze. First, the RCR and Divorce decree are mutually exclusive. Both cannot be granted simultaneously for obvious reasons but both can be denied! The Divorce petition may be dismissed based upon your opposition to it, assuming that you have valid defenses. Yet, your RCR decree may also be rejected for a host of reasons - You may not have a visa to the foreign country, he may have just reasons for his inability to come to India now. Also, suppose you do get a RCR decree in your favor, he can still fail to comply with it and then post-decree provide valid grounds for his inability to comply with it. Been abroad is a perfect defense.
There is also this intermediate beast called "Judicial Separation." It is something between a divorce and a RCR-and-all's-well situation and after one or two years (I forgot), a party can apply to convert it to Divorce.
Can husband file divorce petition again? Whatever grounds he provides for in the first divorce petition cannot be used by him again. However, new facts or different legal-basis are perfectly valid reasons to file a fresh divorce petition.
RCR does help to convince the Judge that you are genuinely against divorce and to therefore reject the divorce petition filed by your husband. It is a good litigation strategy to avoid divorce. Even if the RCR is not honored by your husband, it would have served the purpose of dismissing the divorce petition.
This is very general advice. The facts of your case need to be known in detail before anyone can advice you convincingly.
