Via holoplus:

hololive English is holding auditions for virtual content creators! Take your first step toward your dreams with hololive English! 👀✨

Edit: Note: Apparently auditions have been permanently opened for a while and this is just a reminder. However, due to other recent events detailed in my comments below, this audition reminder could still indicate a new gen is on the way. I wouldn't expect any news for at least the next six months.