I've been plotting out my next novel, but another storyline (very different from the one I've been working on) keeps poking itself into my forebrain.  Now I'm not sure which one to start writing.

Plot A: urban fantasy, female main chr, lots of action, maybe some romance.

Plot B: regency-esque historical fantasy (not set in the real world, however), main chr female soldier having to adjust to a male dominated society (and vice versa).

I've had plot b in my head longer, but I know more of the overall plot of plot a.  Hmmmm.  I don't know that I could write two at once...