The image mirrored below is of a "Limited Edition" version of Gigawatt, with 1,985 pieces available starting today at approximately 1 PM EDT on Walmart.com. The link for this currently returns an error page, but is reported by the Mashable article as being here: https://www.walmart.com/ip/TRA-GEN-PROJ ... /504056937
Another version of Gigawatt, for which there are no images thus far, will be made available on October 1st through Hasbro Pulse and other unspecified retail channels.
Additionally, a four-issue crossover comic from IDW Publishing will indeed be happening. No details other than its existence and a pair of cover images were available at this time. Those and more images of the toy are mirrored below.
Good luck to all the Seibertronians looking to score a preorder for the limited edition Gigawatt this afternoon, and keep it here at Seibertron.com for all the latest Transformers news!