Thread:Undoniel/@comment-12959254-20151211214859/@comment-11836-20151211230439

I like to think the crossover does take place in both IDW Transformers canon and Earth-7642, but the rest of the Marvel crossovers don't take place in IDW Transformers. Meaning, Superman doesn't exist in IDW continuity, but does exist in Earth-Crossover.

It's not the only time Transformers has the same stories happen in different universes. The main one being the Marvel US continuity and the Marvel UK continuity. Many of the stories exist in both, but some take place only in their respective continuities. The origins of how Bumblebee became Goldbug differs depending on the universe.