The two-party duopoly wouldn't let an independent have any chance. The best shot for a third choice is the libertarians, or greens (although less likely), to continue growing.
Perot did better then those pissant third parties ever have or will. The fact that Perot did so much better then they did, not mentioning third party successes, in Maine and Minnesota, and Vermont. They show that indepents actually can win. Libertarians and Greens failure to gain steam, is because they're percieved as radicals. Noone wants them in office but the fringe.