We knew the Transformers One film was an origin story to the eventual conflict between Optimus and Megatron but we didn't know it would be an origin story to them actually being Transformers. Someone who attended the China Licensing Expo reported on seeing the teaser for Transformers One and posted it on
Baidu. The translation is below and it may not be 100% accurate (for instance, the word 'dream' seems inacurate). And remember, this is just the words of one person who claims they were there.
“On the afternoon of the 16th, I attended the [China Licensing Expo]. I was fortunate to see some news about next year’s animated blockbuster movie, 'Transformers One'. The key highlight was the release of a teaser, which couldn’t be recorded on the spot. From memory, I sketched the appearances of the two main characters. However, please note that these sketches are based solely on my recollection, and the actual appearance might differ, so I recommend waiting for the teaser.
It seems that the details of the movie are still being kept under wraps. According to the people from [the expo], they only received the teaser yesterday. The plot is expected to revolve around the love, hate, and rivalry between Optimus Prime, Megatron, Bumblebee, and Elita, as well as their journey to obtaining the Transformation Cog. Initially, they have a hollow space in their chests, as depicted in my drawings. After acquiring the Transformation Cog, their chest designs will change. In the middle to later stages, they gain the ability to transform, and their initial incomplete forms appear in various humorous and bizarre shapes. They can transform into vehicles like trucks, tanks, sports cars, and motorcycles.
Characters such as Shockwave, Soundwave, and Starscream are also introduced, but at that time, they are not yet enemies. Everything appears to be reminiscent of the beginning of a dream. The movie is produced by Industrial Light & Magic, the studio responsible for Transformers 1-5, so the quality should be good.
The overall character designs are more rounded compared to the previous posters, and it might take some getting used to for everyone. I’ve never seen character designs quite like these, so they are somewhat unique. For example, Alpha Trion (translation not clear) appears to be more elemental, like a mix of stone and vegetation, which is very different from the usual Cybertronian designs. Sentinel (translation not clear) is blue, and I don’t have a clear impression of other characters.”