Board Thread:The Flash discussions/@comment-7890302-20171018005240/@comment-29295626-20171019202345

Ralph Dibny is most likely going to be one of DeVoe's metahumans, one of the producers/showrunners said that Dibny's powers did not come from the particle accelerator. Philosopher's Stone seems like an unlikely source as well.

It's just that he's the only metahuman who was in Central City during the particle accelerator explosion - although he probably vanished and was given his powers by DeVoe sometime in that period leading the CCPD to think he was dead.