It is probably too early to take action contingent on DOMA being repealed. It is not a sure thing that DOMA will even be repealed and much too soon to know the consequences on immigration law. There are simply too many factors involved to know for sure. If and when the time comes, consult an experienced immigration attorney for advice and guidance.
Please see the answer to your other question.
J Charles Ferrari Eng & Nishimura 213.622.2255 The statement above is general in nature, as not all the facts are known. You should retain an attorney to review all the facts specific to your case in order to receive advise specific to your case. The statement above does not create an attorney/client relationship.