I wouldn't be to optimistic on the hope of seeing Eno among the band's stage-members, I've heard he hates doing stage-shows. On the other hand, if a reunited Roxy manage to persuade him, I personally would have recommended "Fractal Zoom" for the gesture, and for the nerve in it. "Fractal Zoom" contains some almost Gregorian-electro-chant but is mostly both rhythm and got hihgly soul driven and modern-mysterious soundscape.
The tune is from Eno's album "Nerve Net" from 1992. An opening like that, with Ferry pushing in to the scene, would probably give the audiance a grand doze Horse d'Ouvre of aural and tensie extazy.
http://www.youtube.com/watch?v=bHXHuXEE ... re=related -St.L-