Ok guys, just looked around on some other forums. This one did go on sale and is sold out at this time [emoji20]
HOWEVER, Amazon FREQUENTLY brings their exclusive POP!s back into stock (e.g. Unmasked Star-Lord & GITD Baymax). I think until release, it will just be a matter of catching a cancelation or restock online. Once released (or possibly just before/after), I think they will show back up. Also, as mentioned before, Forbidden Planet (UK) does have these for sale. Popcultcha (Australia) has them as well.