Those familiar with multiverse theory may be aware that the same people, places, and things may exist in multiple universes at the same time. The universe in which Overwatch takes place may well have had its own version one Robert E. O. Speedwagon. You may recognize him from JoJo. In the Overwatch universe he may have had children who went on to have children themselves. And so on, and so on.
And one of those descendants may be Overwatch’s own Lena Oxton. Maybe we could get a get a Speedwagon skin if that coat was passed down.