It wasn't long ago that Pirates fans were looking ahead to a Dream Outfield of Andrew McCutchen, Starling Marte, and Gregory Polanco. That future outfield would be continued when Austin Meadows eventually forced his way into the majors and led to a McCutchen trade.
The rotation had a similar situation, with Gerrit Cole, Jameson Taillon, and Tyler Glasnow all looking like top of the rotation options, or at least better than average guys. They would be joined by guys like Nick Kingham and other pitching prospects to round out the final two spots.
As we know, it didn't work out that way.