to get around scope the new eagle will need a holding corporation and two certificates. Simmons and Executive certificates or they can give eagle the TWA certificate as a bonus. Simmons does the feed for AA with the 50 seater's and via interline agreement executive can use larger aircraft 70 seater's for AA,. Then codeshare with all oneworld members for all USA domestic, Canada. Caribbean, Mexico connections/feed.
Now AA can park the S80. AA still has the domestic coverage via oneworld codeshare in reverse. Since open skies exists from every major country, the oneworld partners will list the flights under there ID and codeshare with the executive certificate for all through flights into and out of the USA.