:: dbus-python and python2-dbus are in conflict. Remove python2-dbus?" [y/N]
error: unresolvable package conflicts detected
error: failed to prepare transaction (conflicting dependencies)
:: dbus-python and python2-dbus are in conflict
:: Replace hunspell-en_US with extra/hunspell-en_us [Y/n]
warning: plymouth: local (1:0.8.8-3) is newer than extra (0.9.5.r84.ge554475-1)
:: Replace python-dbus with extra/dbus-python? [Y/n]
:: Replace python-dbus-common with extra/dbus-python? [Y/n]
looking for conflicting packages…
You could try the following, but never do this with third-party packages…
sudo pacman -Syyu --overwrite="/usr/*"
Those are normal messages. It means that the packaging has changed for certain packages in the repositories due to them having been moved between different repositories or having become bundled as dependencies of other packages, or something similar.