At the moment the only TV channel confirmed to broadcast the concert is M6 in France which we reported earlier in the month - more details can be found here.
Other TV stations who have expressed an interest in the show are ET1 (Greece) and Star TV (Star TV Canada or Star TV Asia). European subscription based channel Filmnet were initially interested in broadcasting the show, however plans fell through and now will not be happening.
At present, it is likely the show will be on Greek TV, possibly during the week of the concert.
The past few weeks has seen a tussle as to who will shoot the show. Jean Michel wanted Mike Mansfield and his team to produce the film, while the Greek authorities expressed their desire for Greek TV to be present for the filming (some of the people in Greece behind the show have relations who run the Greek TV channel who they want to film Akropolis). It now appears that Jean Michel will not get his wish and Greek TV will film the show - however this is not 100% confirmed (a decision was expected to be made on Wednesday 13th June).