The couple - who announced their seven-year marriage was over on Friday (15.07.11) - had both signed up to be in new talent show 'Q'Viva! The Chosen', devised by media mogul Simon Fuller, which has been thrown in doubt as their break up is reportedly "far from amicable".
A source told the Daily Mirror newspaper: "Simon has been assured Marc and Jennifer are both professional enough to put on a good show regardless of any personal problems they may be having.
"But behind the scenes it's a very different story. They are barely on speaking terms, and only converse to talk about their children.
"The split is far from amicable although they do hope to be friends in the future."
The couple were due to tour 21 countries seeking new Latino talent on the programme, but it is thought 'American Idol' judge Jennifer could just let Marc do the show.
The source added: "Jennifer has been brilliant on Simon's other pet project, 'American Idol', so The Feeling is she will leave Marc to do 'Q'Viva!'
"The only other option is that Marc and Jennifer still do it but travel separately, and have Jamie sit between them on the judging panel. Things could get very awkward."