on another board the same question was asked and here is the question and the answer form an expert:
I have already received my visa on 4 january but i am still in my home country. i want to marry now and take my boyfriend with me. what are my chances? can you help me
The news is not good. Your chances are unfortunately "ZERO" for the next few years. As mentioned several dozen times on this board (perhaps you are new to the board), if you do not get married prior to the interview, you cannot reasonably soon expect to bring over a new spouse on a DV visa. It is possible to do this, but the time involved is roughly four to five years (yes years not months) to be able to get the visa. So, you unfortunately are now in a position where you must move to the U.S. within 6 months of January 4th, and you cannot bring your boyfriend with you, even if you marry him. The only viable alternative is to try to get him another visa such as an H1B, or even a student visa...but you cannot work on a student visa.(except for on campus work/study programs). Sorry to bring such bad news, anyone else reading this needs to know you should get married BEFORE the interview or have a very, very long wait to be able to get a visa.