User blog comment:BartAllen2ndKidFlash/Could Vigilante. be Furture verson of Prometheus/@comment-27700324-20170303050621/@comment-3423279-20170303090203

Those things are dime a dozen nowadays.

You got the Waverider, TARDIS, Delorean, and whatever Jack Harkness' time watch was.

And considering Malcolm Merlyn is just Jack Harkness, it's obvious where Adrian got the time machine from.