Joss Whedon may be jumping ship over to DC.
The rumor may have some merit as Whedon recently let it be known that he is a big fan of The Flash series, and Grant Gustin also recently said he wants Joss Whedon to direct an episode of The Flash.
Whedon also previously directed musical episodes for Buffy and Glee; the latter saw both Grant Gustin and Melissa Benoist star in the series.
The villain of The Flash and Supergirl musical crossover is also rumored to be the Music Meiser, which was a character created for the Batman: The Brave and The Bold animated series musical episode. It's also suggested Neil Patrick Harris may play the role as Harris voiced Music Meiser and also was featured in Whedon's Dr. Horrible Sing-Along musical.
Hopefully if the rumor turns out to be true, this is a sign that things between Joss Whedon and WB are mending as there has been bad blood between the two over years back when Whedon was involved with various Wonder Woman and Batman projects. Bringing Joss Whedon over to the DCEU wouldn't be a bad thing at all as well.
Joss Whedon recently parted ways with Marvel following The Avengers 2, with Marvel CEO Ike Perlmutter's interference said to be the blame; however, with Kevin Feige booting Perlmutter from Marvel Studios, now Whedon has said he would still like to do work for Marvel Studios again and even said he wouldn't mind directing a Black Widow movie.