According to information on the IFL website, the league has chosen to expand to Charlotte for the 2013 season. There was a Carolina Speed franchise in the SIFL (Southern Indoor Football League) that played at Bojangles' Coliseum and the Cabarrus Arena & Events Center, and this does appear to be the same franchise.
Here's the rest of the information from goifl.com:
The expansion team which has been named the Charlotte Speed will hold an introductory press conference held in Charlotte,N.C. An announcement is being planned for sometime early March 2012 with the goal of answering questions from the media and community at that time.
"It is an outstanding privilege to be able to bring an IFL team to Charlotte. We look forward to being competitive and to bringing a championship to this city," state both team President Larry Kennedy and Owner Eddie Littlefield. "We feel honored and confident in our abilities to be successful in the wonderful Charlotte market which contains an NFL, NBA and now an IFL team."
League Commissioner Tommy Benizio adds, "I am very excited to welcome a 17th team into the IFL. Charlotte is now our third franchise on the East Coast. League expansion is progressing very well including into other markets on the East Coast. Based on this progression the IFL is hopeful to have a solid division on the East Coast for the 2013 season. It is really a testament to the strength of our league that we can continue to build new, successful franchises across the country. The new ownership group in Charlotte is very impressive and I look forward to seeing their positive contributions on and off the field."