Wouldn't this just be the "studio"based recording of the songs going to be used in the upcoming TV recording at Johnstown?
I think that's likely.
There have been a few instances where the albums and DVDs were done at different times (ie. A Christmas Celebration, Home for Christmas). But I'm pretty sure they're recording the album to go along with the DVD.
Whether or not the album will have the same members as the DVD will have the same members is less certain.