After a day of hard google skills I've done it and and I completely updated to libbluray 1.1.1 and also I've updated a bunch of dll dependency for the newest I could find.
First, for anyone looking you can find libbluray-2.dll already compiled here:
http://repo.msys2.org/mingw/x86_64/
But this won't be enough, you will need the following:
libbluray-awt-j2se-1.1.1
libbluray-j2se-1.1.1
That you can find here:
https://nightlies.videolan.org/build/contribs/
This covers libbluray 1.1.1 but you will need:
libatomic-1.dll
libbz2-1.dll
libcharset.dll
libcharset-1.dll
libfreetype.dll
libfreetype-6.dll
libgcc_s_seh-1.dll
libglib-2.0-0.dll
libgomp-1.dll
libgraphite2.dll
libharfbuzz-0.dll
libharfbuzz-gobject-0.dll
libharfbuzz-icu-0.dll
libharfbuzz-subset-0.dll
libiconv.dll
libiconv-2.dll
libintl-8.dll
liblzma-5.dll
libminizip-1.dll
libpcre-1.dll
libpcre2-8-0.dll
libpng16-16.dll
libquadmath-0.dll
libssp-0.dll
libstdc++-6.dll
libwinpthread-1.dll
libxml2.dll
libxml2-2.dll
libzip.dll
zlib1.dll
You can find most of those in:
http://repo.msys2.org/mingw/x86_64/
Those are the packages I used to updated:
mingw-w64-x86_64-bzip2-1.0.6-6-any.pkg.tar
mingw-w64-x86_64-cmake-3.14.2-1-any.pkg.tar
mingw-w64-x86_64-freetype-2.9.1-1-any.pkg.tar
mingw-w64-x86_64-gcc-libs-8.3.0-2-any.pkg.tar
mingw-w64-x86_64-geocode-glib-3.26.1-1-any.pkg.tar
mingw-w64-x86_64-gettext-0.19.8.1-8-any.pkg.tar
mingw-w64-x86_64-gimp-2.9.8-1-any.pkg.tar
mingw-w64-x86_64-glib2-2.60.1-1-any.pkg.tar
mingw-w64-x86_64-graphite2-1.3.13-1-any.pkg.tar
mingw-w64-x86_64-harfbuzz-2.4.0-2-any.pkg.tar
mingw-w64-x86_64-libbluray-1.1.1-1-any.pkg.tar
mingw-w64-x86_64-libiconv-1.15-3-any.pkg.tar
mingw-w64-x86_64-libpng-1.6.37-3-any.pkg.tar
mingw-w64-x86_64-libwinpthread-git-7.0.0.5325.11a5459d-1-any.pkg.tar
mingw-w64-x86_64-libxml2-2.9.9-1-any.pkg.tar
mingw-w64-x86_64-libzip-1.5.2-1-any.pkg.tar
mingw-w64-x86_64-optipng-0.7.6-1-any.pkg.tar
mingw-w64-x86_64-pcre2-10.33-1-any.pkg.tar
mingw-w64-x86_64-pcre-8.43-1-any.pkg.tar
mingw-w64-x86_64-xz-5.2.4-1-any.pkg.tar
mingw-w64-x86_64-zlib-1.2.11-5-any.pkg.tar
This means, not only I'm offering here libbluray to it's most up to date version but also all those libraries that if I would have to guess Kodi uses some really out dated ones.
TL;DR
Download this and have a bunch of libraries updated and libbluray 1.1.1 (the latest) with full UHD BD support:
https://mega.nz/#!zYVGnCYT!HRh_AzoTAmPIL...SmAUuxvPnA