Well, when I had spoken to David McLees about this he did say that "Rhino were planning to remaster all of the WB/Reprise FM albums though they would be starting with the BN era ones" and that they "would all have bonus tracks and not just be straight reissues with no bonus tracks" (so I guess it's safe to assume from this that the next batch will include the likes of "Mirage", TITN etc.).
I know Bob Welch is not optimistic about this from his 2nd Penguin Q & A comments about it and I can see why many would doubt this happening but Rhino have remastered band's catalogs in the past and included their duds as well as thei hits (Chicago comes to mind) so I'd imagine what are considered FM's "less popular" albums will get the same treatment as the likes of Chicago 13 & 14 etc.
John