Good post, Z Kidd. Eyebrows and eyes are very important in how we communicate, so it's cool that people are recognizing this. I've been reading the Definitive Book of Body Language (which is awesome, by the way) and it talks about this in the chapter on eye signals. I'll share the excerpt with you here:
Lowering the eyebrows is how humans show dominance or aggression towards others, whereas raising the eyebrows shows submission. Keating & Keating found that several species of apes and mokeys use exactly the same gestures for the same purpose. They also found that people who intentionally raise their eyebrows are perceived as submissive by both humans and apes, and that those who lower them are perceived as aggressive.
In Why Men Lie and Women Cry (Orion) we showed how women widen their eyes by raising their eyebrows and eyelids to create the "baby face" appearance of a small infant. This has a powerful effect on men by releasing hormones into the brain, which stimulate the desire to protect and defend females. Women pluck and redraw their eyebrows higher up the forehead to appear more submissive because, on a subconscious level at least, they know it appeals to men. If men trim their eyebrows, they do it from the top of the eyebrow down, to make their eyes appear narrower and more authoritative.
John F. Kennedy had what are known as "medially down-turned" eyebrows, which gave his face a permanently concerned look that appealed to voters. If he'd had big bushy eyebrows like actor James Cagney's, he would have had a less powerful impact on the electorate.
This is a little different than the examples you showed though, because this is about eyebrow height, whereas you're talking about eyebrow arch. MJ's eyebrows (at least in one of the photos) are both high and have a steep arch, which you mentioned looks feminine at that extremity. Michael Keaton's eyebrows, on the other hand, arch down into the bridge of his nose in this kind of permanent frown, which serves to expose his eyes while also appearing pretty authoritative. Words I would use to describe that look could be serious, focused, cross. Maybe alpha. Whether this look appeals to women though, I dunno... I guess we should ask.