A rough Google translation of the text attached to the picture indicates that they are inviting Weibo users to identify who the four characters on the image are. Later, an image revealing all characters will be posted, and Weibo followers will have the opportunity to decide which character will appear in 2020 for the War For Cybertron line.
The images shows four silhouettes that are not so hard to identify. We can spot: Gnaw, Runabout/Runamuck, Needlenose and Shrapnel. Taking in consideration that Gnaw and Shrapnel already got recent updated molds, it could be possible to bet on new Runabout/Runamuck molds (they were exclusive to the Transformers collectors Club in 2012) or a new Neeedlenose figure (The Combiner Wars Needlenose was just a redeco of CW Firefly and exclusive to the Figure Subscription Service). Time to place your bets.
Update: The original picture was taken down from the Official Transformers Weibo Account
Remember to take it with a grain of salt until we get another proper translation or official confirmation via other Hasbro channels. Click on the bar to see the mirrored image and then share your impressions on the 2005 Boards!