Yeah but Swissair are better! =) Sorry, just joking...
You make a good point about the size of AF and about DL/SR etc veering towards the onworld alliance. But, do you think there is really a need for a carrier such as AF in oneworld? After all, BA has its Air Liberte in there already, so the demand for a french carrier isn't really there, don't you think? Also, doesn't British Airways have more intra-European destinations than Air France? I have a feeling they might.
What I see happening is a new alliance between CO and AF, similar to that one of KL/NW and now AZ. CO and AF already have numerous code-share agreements, so I can see only this as a follow on from that. Anyway, time will tell I guess! =)
By the way, does anyone know how relations are between DL and AA? Is there a real possibilty that DL is looking to oneworld?