John Gaburick officially announced as much on Twitter earlier today:
EC3 has been an integral part of TNA programming for well over a year now and is consistently booked as one of the company's biggest stars. While you can criticize TNA for any number of misgivings, Carter stands out from the bunch.
This comes on the heels of the announcement that Abyss re-upped with the company earlier today. Gaburick has promised more signings in the next week or so.