Headcanon that they are one in the same, anyone? I missed it tonight, but, with the season premier of Legends of Tomorrow tonight, I thought it would be a good time to share!
In case you are seeing this in the DC community and are unfamiliar with Doctor Who, Rory Williams was a companion of the Doctor (one of my top 2 favorites!) who had a habit of dying, then somehow turning up fine, usually at a different point in time (not the only DW character who has a complicated relationship with death, btw)
So I think it's entirely plausible that he found himself in/around the year 2166 and became a Time Master!