Well there is the Deluxe version of Madman coming, does that imply an EJ one as well?
My gut tells me no. Madman is a 50th Anniversary reissue. My guess is that they will just keep pushing on with more 50th Anniversary sets of the classic albums. Also, Elton John & Tumbleweed Connection had expanded 2 CD editions released a few years back. My fingers are crossed that this is the start of a series and that we will eventually (and finally) get to hear Greg Penny's unreleased 5.1 mixes of Don't Shoot Me, Caribou, Rock of the Westies and Blue Moves.