John wrote the complete score 'including a new song'' for new movie ''Ithaca''.

[kicker]

Hopefully the movie does well and there's a soundtrack release in the near future, got my fingers crossed.

http://filmmusicreporter.com/2015/10/21/meg-ryans-ithaca-to-feature-original-score-and-song-by-john-mellencamp/

And this from another article.

''Ryan also got help from her then-john-mellencamp-billboard-650boyfriend John Mellencamp, who composed the entire score — even writing a song that would sound like a standard of the time. “Not one note of that is anything other than Mellencamp. He did everything,”  she said gratefully.''

[walktall2010]

The song John wrote is called "Sugar Hill Mountain" and it is sung by Carlene Carter.