With a handful of commands i've got the tldr pages rendering in man:
mkdir /usr/local/share/man/man0/
pandoc -f markdown_github -t html https://raw.githubusercontent.com/tldr-pages/tldr/master/pages/common/tar.md > /usr/local/share/man/man0/tar.0.html
export MANPAGER="`which lynx` -stdin"
man 0 tar
tada.We really shouldn't be rewriting tools and fragmenting community effort to fit a new feature that is already 90% implemented.
edit: one idea I do like is having content that is easy to contribute to, such as man pages, in separate repositories. Contributing to open source projects for content writers can often be intimidating - having a pure text separate man page repo that all the distro's use would be great.