If the USCIS approved the I-130 petition but the consulate has doubts about the bona fides of the marriage, it can be a complicated process to convince the consulate that the marriage is in fact bona fide. The consulate may return the petition to the USCIS for revocation. If the visa petition is revoked, then it would eliminate your marriage as a basis for your husband's immigration to the U.S.
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The 221g issue needs to be resolved before he can be issued the visa. Without the visa, he cannot enter the US.
You should retain an experienced immigration lawyer to review all the facts, advise you, and handle the case.
J Charles Ferrari Eng & Nishimura 213.622.2255 The statement above is general in nature and does not constitute legal advice, 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. Answers on Avvo can only be general ones, as specific answers would require knowledge of all the facts. As such, they may or may not apply to the question.