Hi @zgaw, no worries about the wait — glad Timeshift saved you! 
The black screen with cursor is most likely because the NVIDIA driver package for the LTS kernel is missing. The regular nvidia package only works with the standard kernel — each kernel needs its own matching driver.
From TTY, run:
sudo pacman -S nvidia-open-lts
sudo mkinitcpio -P
sudo reboot
Also worth trying a different kernel if LTS keeps giving trouble.
List available kernels in the repo.
pacman -Ss '^linux[0-9-]*$'
Example zen kernel
sudo pacman -S linux-zen linux-zen-headers nvidia-zen
sudo mkinitcpio -P
sudo reboot
To check what’s actually failing before rebooting:
systemctl status display-manager