While revealing their Marvel Legends SDCC Defenders set, Hasbro has also shared the following image of what appears to be another SDCC 2018 set.
The set is titled as Red Skull & Electronic Tesseract. It uses the same logo and design as the First Ten Years Legends sets. With the upcoming Red Skull figure in this line, it seems like this could be an advance release of that figure - packed with either some 1/12 scale diorama of the Tesseract that lights up OR packed with a 1:1 scale Tesseract which would also make sense considering that these prop replica's also sit in the Legends brand.
We await more details.