It is, as far I know, just other people singing his songs. But, the press release I saw for it said more acts would be announced and it certainly wouldn't be odd for a large-scale tribute album to feature at least one song with the tributee. You can see a list of the songs and artists announced so far in this post.
'Pilgrim,' the Kris tribute album due out in June, now has a CD cover. Click for a bigger version.
