Another hot property based on the Edgar Rice Burroughs novels. Disney made a hit movie out of the character and before that we saw multiple film and television versions. 2016 gave us The Legend of Tarzan, which was a modest success.
While the character has his constraints, story-wise, perhaps you could put Tarzan in another era—or another planet for that matter.
But beware, the Edgar Rice Burroughs estate will not hesitate to heavily litigate the use of this character, specifically through trademark infringement laws. While many of the novels are in the public domain, the estate wants to protect its various licensing agreements. Writers should proceed with caution.