The Tamashii MIX Mechagodzilla has been shown with what looks like a preorder date of 3/25, cited by SHMA Lovers Thailand! Since it has a specific date that could mean web exclusive, but more as it comes.
Orb Origin is a regular release, while The First is an Amazon.jp exclusive! I may take orders to help those out who need it. if you're interested, shoot me an email at stevenstoyreviews@gmail.com