In season 5 episode 8 we discover that:
XS is working in the future (2049) with Eobard Thawne, however Eobard was erased from existence in season 1 and then again captured by the time ghosts after his appearance on Legends of Tomorrow. I had thought we was definitely gone, specially since Eddie Thawne remains dead and gone.
So how is he alive? Did I miss something?