1) If wife or husband really want divorce then the relationship is over. No court can force anyone to stay in marriage.
2) If wife files for divorce on grounds of mental cruelty, approach wife and try to go for divorce by mutual consent. This save time and money for both sides.
3) If she does not agree and is hell bent on fighting court cases then there is nothing you can do to stop her.
4) In worst case situation you may have to pay maintenance while cases go on. This is only if wife has no other source of income or has very little income.
5) You may have to bear some cost of lawyer to defend the cases.
6) No other ill effect on husband by all these cases.
7) Do not try to remarry. Marriage in India has become bussiness due to poorly written laws, non functional courts, corrupt lawyers and mindset of women. Go for live-in or casual relationship with other woman who shows you love and respect. Let the stubborn wife fight in courts, she will get nothing.