Pretty much right away Optimus Prime had to be Reinhardt," Rogers adds. "Our concept team cranked out actually quite a few ideas for multiple characters. Reinhardt was always Optimus and Ramattra just felt like that was our Megatron no matter what. But we did explore a few other heroes like Pharah as Starscream actually, and Lucio, we tried to make Soundwave work on him. There's some favorites on the team that we landed on. The concept team did a really good job of just exploring a bunch of ideas.
...
Another Overwatch 2 hero that was considered for the Transformers collab is Wrecking Ball, who would have been paired with Unicron, the planet-sized Transformer.