Is the Gemma Doyle trilogy going to become a four part series?

I lovelovelove Libba Bray's series and at the end of the third book, there was a wide open ending and in an interview she said another sequel could happen. I was wondering if anything was concrete?Is the Gemma Doyle trilogy going to become a four part series?
nothing is set in stone just yet.


but maybe.


i would love that.


i pretty much hated the end.





i adored kartik...





but let's hope for another book, shall we?