I was just looking at the news posting on tfw for that.

They appear to be by Hasbro HK, so will only be directly released to the Asian Hasbro markets (HK, Singapore, China, Taiwan, etc).

Soundwave is already out.
Optimus is slated for release this month.
While the other three (Astrotrain, Magnus, Powermaster Prime w/ Apex Armor) are listed as November release.

The prices at BBTS are pretty shocking though.
Best to source these through Asian dealers or sellers, if you are after any of these.