I pray Missy isn't a female Master, it'd be pointless. The Rani was created for the purpose of being a female timelord antagonist, what's the point of making the Master female? And that would mean my worst fears could become true one day: a female doctor. NOOOOOOO!!!!!!!!!!
Personally I'd like her to be the Rani or someone new.
Personally, this is the sort of reaction that makes me pray that Missy is a female Master.
Seriously, your WORST fear is a female Doctor? Really? Suddenly you would stop watching Doctor Who?
The casual misogyny of science fiction fans always astounds me.