A search in the ASCAP music database has revealed a song co-written by Coldplay and James Newton Howard (Catching Fire score composer) titled "We're A Team".
The ASCAP database catalogues and displays musical compositions submitted for licensing. This song is listed with Universal Music as the publisher, who will be releasing the soundtrack albums through Republic and Parlophone (UK).
It is currently unclear whether this song is intended for the soundtrack album or the movie score itself.
This is just a rumour, and should not be considered truth until official confirmation from Lionsgate.
Thanks to @THGAustralia for the tip!