B/G might be the best immediate deck for Fatal Push (4x Ghost Quarter isn't viable in a 3 color deck).
Main deck is straightforward. I'm running Kitchen Finks over Scavenging Ooze for the low percentage where opponent can't trigger Fatal Push. I'm running Tasigur, the Golden Fang and Gurmag Angler as big threats that dodge push. Otherwise threats are standard.
Hand disruption is a standard split. Going 3x Thoughtseize 3x Inquisition of Kozilek due to expected slowing of the format.
Removal is varied. The obvious change is 4x Fatal Push. I'm running a little heavy on Abrupt Decay due to its diverse uses. If Snapcaster decks become popular that might drop down to 2x. Other removal is split between 2x Victim of Night and 1x Dismember. While a fairly inelegant response, between the two spells they deal with everything that Fatal Push can't hit. Except Mirran Crusader.
Deck is land light, but i haven't had any struggle with this lay-out with abzan, and the 2x Mishra's Bauble are great at ensuring sufficient mana. The real key here is Ghost Quarter which helps a ton against Tron.
Sideboard is a bit interesting. I decided to remove 2x Golgari Charm, as the main use for the card was against infect. Between the reveal of Fatal Push and the banning of Gitaxian Probe, I expect to see a lot less infect. Liliana, the Last Hope is there for what infect remains, as well as the affinity match up. I also removed 1x Night of Souls' Betrayal.
I added 1x Ishkanah, Grafwidow in anticipation of a resurgence in midrange decks. Against Jund and abzan decks the card represents multiple bodies and at 5 mana, dodges push. Ishkanah is easily my most questionable include, but I couldn't come up with a better solution.
The key to the Tron match-up is the 2x Surgical Extraction. The potential devastation of turn 1 ghost quarter + extraction is crippling for that deck.
Tell me what you think! Leave a comment, +1. Happy to answer any questions you may have.