A little bit more news coming out of Tokyo Toy Fair, it appears that Soundwave and his cassettes will be released as part of "Project Soundwave". Soundwave will be released with one cassette (most likely Laserbeak) and the other cassettes will be released in 2 packs, including an MP Ratbat.

Obviously, this is subject to change but that is what was said by one of the designers at the show.