I was thinking of some decks that could be very popular in standard next year, and the first thought that came to mind was Mega Ray. Since Joltik is leaving standard, Rayquaza can rule the meta game. But a good counter to that I thought was Zebstrika from Breakpoint, since its move crashing Bolt will KO Mega Ray in one hit. Here's a deck list I came up with, but I think it can be better.
Pokémon - 18
2 Ampharos-EX AOR 27
2 M Ampharos-EX AOR 28
4 Blitzle BKP 48
4 Zebstrika BKP 49
1 Magnemite BKT 52
2 Magnemite BKT 51
1 Magneton BKT 53
2 Magnezone BKT 54
Trainer Cards - 28
2 Ultra Ball
2 Acro Bike
2 Crushing Hammer
2 Max Elixir
2 Professor's Letter
2 Trainers' Mail
1 Brigette
2 Professor Sycamore
2 Parallel City
2 Rough Seas
4 Fighting Fury Belt
1 Wide Lens
2 Rare Candy
2 Ampharos Spirit Link
Energy - 14
2 Flash Energy AOR 83
8 Lightning Energy Energy 4
4 Double Colorless Energy NXD 92
Pokémon - 18
2 Ampharos-EX AOR 27
2 M Ampharos-EX AOR 28
4 Blitzle BKP 48
4 Zebstrika BKP 49
1 Magnemite BKT 52
2 Magnemite BKT 51
1 Magneton BKT 53
2 Magnezone BKT 54
Trainer Cards - 28
2 Ultra Ball
2 Acro Bike
2 Crushing Hammer
2 Max Elixir
2 Professor's Letter
2 Trainers' Mail
1 Brigette
2 Professor Sycamore
2 Parallel City
2 Rough Seas
4 Fighting Fury Belt
1 Wide Lens
2 Rare Candy
2 Ampharos Spirit Link
Energy - 14
2 Flash Energy AOR 83
8 Lightning Energy Energy 4
4 Double Colorless Energy NXD 92