Batman and heck most DC comics characters. There are DC comics shows and movies aimed at kids and DC comics shows and movies, both live action and animated aimed adults (3rd season of Young Justice, the DTV movies, the Harley Quinn show, Doom Patrol, the Joker movie, etc). Heck the TMNT showed up in a PG-13 DC comics DTV.Oh yeah? Name one, and no, Sonic the Hedgehog doesn't count, since they're both family shows, plus TMNT 2012 and the two Michael Bay (?) productions is a subjective example. Oh yeah, and Transformers doesn't count either because it's not that simple.
Oh, and one other thing, "Masters of the Universe" and "Princess of Power" are collectively Mattel's Intellectual Property, so they own the rights to the franchise period. On the other hand, they do own the rights to the 2002 series since they were directly involved in its production (and before anyone says it, Mike Young Productions* was only responsible for the animation production).
*They're now part of what is now known as Splash Entertainment, which has a distribution division, but does not own the rights to the 2002 series.
Not mention the comics these series are based on are often darker than their animated adaptions, look at Mirage Comics for TMNT and the TNMT animated series. The He-Man comics that came before the Flimation series were darker than that series.
These franchises can tell different stories for different people.