I'm surprised that it seems like we're not getting pre-release reveals of Pikipeks evolutions though.
Yeah I am surprised. We did get Talonflame during XY pre-release as one of of many Pokemon revealed around the time of E3 2013, even if Fairy-type announcement overshadowed it.
I think Pidove's middle evolution (Tranquill) was revealed around BW pre-release as well, but a read through the archives might prove me wrong.