As noted earlier, TNA Dixie Carter tweeted this afternoon that a "major announcement will be made on Thursday's episode of Impact wrestling that will "change everything for our wrestlers, company & YOU our audience!"
The announcement will be that TNA will be taking Impact Wrestling on the road in 2013. TNA will still run occasional tapings from the Impact Zone in Orlando, FL.
When Impact goes on the road, TNA will air a live episode of Impact and then tape the following week's show right afterwards. This is a similar format to the early days of WWE Monday Night RAW.
The first taping on the road will be Thursday March 14th from Hoffman Estates, IL at the Sears Centre Arena, a venue that TNA has held live events at before.
Thursday's Impact episode was taped last week in Manchester, England and there were no reports of an announcement made for the live crowd, so the announcement will be edited into the show.
(Sources: f4wonline.com & pwinsider.com)