Zombies are definitely back in the Standard metagame, big thanks to Amonkhet. It was the top 5 deck archetype during the metagame breakdown at Pro Tour Amonkhet Day 1 and continues to do so on Day 2. Two of which made it in the Top 8 played by the well-renowned Pros Christian Calcano and Gerry Thompson. Here below is the decklist piloted by Calcano.

24 LANDS
22 Swamp
2 Westvale Abbey

24 CREATURES
4 Cryptbreaker
4 Diregraf Colossus
4 Dread Wanderer
4 Lord of the Accursed
4 Metallic Mimic
4 Relentless Dead

10 INSTANTS and SORC.
4 Dark Salvation
3 Fatal Push
3 Grasp of Darkness
2 OTHER SPELLS
2 Liliana’s Mastery

Sideboard
2 Gonti, Lord of Luxury
1 Grasp of Darkness
2 Liliana’s Mastery
2 Liliana, the Last Hope
2 Lost Legacy
2 Scrapheap Scrounger
4 Transgress the Mind