I have three kids. Mine are 4, 7 and 9, and they all love He-Man. If I hadn't started collecting the figures and watching the old cartoons my kids would have never been exposed. My oldest son is just now getting into the comics.
Had I not ever showed them any of this they would have never known. We have watched the MOTU movie together at least 5 times now. They love all of it!
This was all my doing of course. No thanks here to mainstream pop culture or Mattel. When we seen the quick cameo in Chappie, my son was the only kid in the theater that actually picked up the reference (he actually cheered for He-Man on the big screen).
I love that my family can enjoy the brand as much as I do, but I do wish it would go a little mainstream for the rest of the world to jump on. The kids that are in school with my kids have NO knowledge of MOTU. A new movie would fix that problem (shirts, hats, new toys, etc. that come along with updated branding.
I hope that it happens one day. Until then, my family and I are more than happy to stay tight in the niche which is MOTU.