The Generations Earthrise toys have a global release date of March, but some have just been found at American Retail, at a Target store.

The since it is only about 5 weeks away from their official release, it isn't surprising that they toys have already made it to Hasbro in America, and some stores have accidentally received them.... possibly because these ones have the same product code as the Siege toys, so might have been mixed up by mistake.
(if we start seeing the rest of the first wave hitting heaps of other American stores, then it was just Hasbro America releasing the toys as soon as they got them from the Asian factories)

The first ones being found were the Micromasters - Hot Rod Patrol and Military Patrol.

Hopefully they start showing up here soon too... but the negative side of that is, the moment Earthrise appears here, we aren't likely to see the remaining Siege toys here.