Previous Post Firebird and her powers would have been interesting in Avengers vs. X-Men seeing as how her powers "look" similar to Phoenix's. Too bad the creators didn't make a connection there.

Still curious for a scan of Avengers Spotlight 24
http://www.comicboards.com/php/show.php?rpy=comicbattles-2012051217014678
where it may have actually been 'hinted' at in context.

It was already surprising to learn, all these years later, at the possible previous precident with a Phoenix connection to K'un Lunn in MofKF. Maybe one of the 5 AvsX writers (recalled &) included the entry
http://www.marvunapp.com/Appendix/jade.htm#firebird
when they were spitballing the AvsX.