sorry, i really don´t know.
however, i think it could be possible that UA might introduce a flight to FRA in the next couple of years.
LH has transferred its 2nd daily to MUC but still, there should be some demand for a 2nd daily from FRA, and afaik, there´s no other airlines serving this sector...
UA does serve CDG and LHR from LAX, doesn´t it?
If only pure sweetness was offered, why's this bitter taste left in my mouth.