There is a proposal to move the date of Indiana's primary from May to March. Even if that happens, it won't make any difference, because of lot of other states are thinking about earlier elections, too:
As of last week, 18 states — including Illinois and Indiana — have proposals to move up their presidential nominating contests to dates far earlier than those in the 2004 campaign.
How about those 2008 Iowa caucuses? Try Jan. 14. What about the Nevada Democrat caucuses? Jan. 19. And the traditional presidential season kickoff, the New Hampshire primary? Jan. 22