HVM Racing (led by Keith Wiggins, formerly of Pacific F1) is working on a 2013 Indycar program: http://auto-racing.speedtv.com/article/indycar-hvm-closing-in-on-indycar-return/
“I would say we are having discussions with a couple of different entities on projects in IndyCar,” said Wiggins. “I think it’s fair to say we’ll have an [IndyCar] entry and we are working with a couple of groups talking about doing IndyCar, and it could take a couple of different forms. We’re not sure what it will be yet.”