I've only just learned of this track now, being 'out of touch' for a while due to life intervening.
There are reports online, but they all seem to be the same press release. E.g. here: https://1063thefox.com/new-eagles-tr...tribute-album/
This is a surprise, as I didn't expect Eagles to record again.“Part Of The Plan,” the Eagles’ first studio recording since the death of Glenn Frey, will appear on the upcoming collection, A Tribute to Dan Fogelberg, according to Variety. Fogelberg and the Eagles had a unique connection — in addition to the band, Joe Walsh and Fogelberg all shared a manger and confidante in Irving Azoff, Walsh produced and performed on Fogelberg’s second album, 1974’s Souvenirs, with “Part Of The Plan” serving as the album’s opening track.
BTW: I wasn't too familiar with the original Souvenir album, so I'm playing it now on Spotify. Of course, I played the songs with Henley/Frey/Meisner participation first.
In terms of the upcoming cover song, I'll be buying the album when it comes out. I don't know what to expect, but I'll soon find out.