They'll take every song into consideration. Also, if the song you wanted doesn't make it into Rock Band 4, they might consider it for DLC at a later point.
http://www.harmonixmusic.com/games/rock-band/request/
Request your favourite OLP songs for Rock Band 4
Request your favourite OLP songs for Rock Band 4
Harmonix set up a page that allows you to request what songs you want for Rock Band 4.
They'll take every song into consideration. Also, if the song you wanted doesn't make it into Rock Band 4, they might consider it for DLC at a later point.
http://www.harmonixmusic.com/games/rock-band/request/
They'll take every song into consideration. Also, if the song you wanted doesn't make it into Rock Band 4, they might consider it for DLC at a later point.
http://www.harmonixmusic.com/games/rock-band/request/