Hmm, that will be interesting to track although both George and Julia have been out of the spotlight so long, idk who is really checking for them anymore. Neither have had a hit for years (decades?).
I think romcoms are the kind of movies that need hundred wattage casting juice behind them to succeed. a Leo and Kate romcom? Would smash at the box office. Tom and Zendaya? Would print money. Anyone else? Eh. Maybe Ryan Reynolds and Blake Lively if they really played up the IRL romance. Sandra and Keanu, although The Lake House was only a modest hit. Ryan Gosling and Rachel McAdams might be lightning in a bottle again.