When will the age of consent for marriage be reduced nationwide? Will it go lower than New Hampshire's age 13?

Laws existing in one state have been used to expand the laws to other states sometimes based on inter-state commerce and others based on perceived or penumbral rights.
The age of consent for marriage in New Hampshire is 13. When I enlisted one of my platoon mates from Tennessee had been married at age 15 to a 14 year old back in the 1970's. There have been efforts to reduce the age of consent by libertarians with more noble intent and sometimes by NAMBLA (North American man/Boy Love Association) with most likely less-noble intent.
I expect the age of consent to be pushed down by litigants in several states this year as they attempt to capitalize on the overturning of DOMA by SCOTUS. I hope the age of consent does not go below age 13 and I hope it won't go that low any time soon.
6/28/2015 Update] Here is the quote from Justice Kennedy's majority opinion discuss in marriage age:
"The significance of state responsibilities for the definition and regulation of marriage dates to the Nation’s beginning; for “when the Constitution was adopted the common understanding was that the domestic relations of husband and wife and parent and child were matters reserved to the States.” Ohio ex rel. Popovici v. Agler, 280 U. S. 379, 383–384 (1930). Marriage laws vary in some respects from State to State. For example, the required minimum age is 16 in Vermont, but only 13 in New Hampshire. Compare Vt. Stat. Ann., Tit. 18, §5142 (2012), with N. H. Rev. Stat. Ann. §457:4 (West Supp. 2012). Likewise the permissible degree of consanguinity can vary (most States permit first cousins to marry, but a handful— such as Iowa and Washington, see Iowa Code §595.19 (2009); Wash. Rev. Code §26.04.020 (2012)—prohibit the practice). But these rules are in every event consistent within each State."