Copyright and Trademark are two areas under making exclusive use of created works. I can't comment about the Lupin the 3rd stuff as I barely know about the series outside of the few episodes I've seen during the old days of broadcast TV and I have no idea about the JoJo's Bizarre Adventure as I haven't seen past the second season.
If there was a lawsuit to be had, it would have happened long ago against the Japanese company that owns the IP of MHA.
Copyright and Trademark are two areas under making exclusive use of created works. I can't comment about the Lupin the 3rd stuff as I barely know about the series outside of the few episodes I've seen during the old days of broadcast TV and I have no idea about the JoJo's Bizarre Adventure as I haven't seen past the second season.