United to EWR might work if Lufthansa are able to go more than daily with MUC and potentially FRA to build up a Star Alliance customer base.
God loves an optomist!
Turkish to Istanbul, would probably work but do the airport want to risk Emirates getting peeved off, especially if the Far East market continues to feel the fall out from Coronavirus as the region makes up the majority of EKs onward connections...
EK don't seem to shy away from a fight - and DXB has stood up well to ME expansion in Scotland and at MAN.