The first pre-release of Manjaro Cinnamon includes some of the very latest contributions of our great community:
manjaro-hello, the new application to welcome the new user on the install media, currently being polished and finalized by @huluti is aleady in great shape and will finally introduce multi-language support on Manjaro welcome screens.
Other than that, you will find the latest packages on the 'unstable' branch of course, including the complete x-apps stack and the latest development-version of installer calamares.
These ISOs were created with manjaro-tools 0.14 branch, which is getting ready to be the next mt stable release and also feature the new (and not completely finished in detail, yet ) grub menu.
Please test thoroughly and give us feedback.