It was already fun to see Shipp on The Flash as Earth-1 Henry Allen (R.I.P.) and Earth-3 Jay Garrick, but there was something special about seeing him play Earth-90 Barry Allen for those who remember him from his time as Barry Allen on his own Flash series.
Marc Guggenheim is former showrunner and current consulting producer of Arrow, and his comments indicate that John Wesley Shipp’s involvement in the “Elseworlds” crossover was a very big deal to him, which is something plenty of Arrow-verse fans can undoubtedly relate to.