Hi, "What do you have in mind" I guess is "What do you think"?
"“What do you have in mind?” Gibbs asked his boss.
“I’ve got some stuff I’d like to try out,” Obama said."
Not exactly. "What do you think?" asks for an opinion. Good, bad, etc.
"What are you considering doing?" is a better translation of "What's on your mind?"
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.