This is my top 4 for Battle Roads.
1) Stage 1s: This is one is quite obvious. This deck just gets insane with Catcher's release. Focusing purely on a bunch of stage 1 builds that can hit hard and cheap, Catcher helps benefits these attackers (the attackers being Donphan, Cincinno, Yanmega, and Zoroark). However, Catcher is not the only the card that'll give Stage 1s more power, but Max Potion and Tornadus as well. Max Potion can make Donphan very hard to take out, and it can also make Yanmega live longer. Tornadus helps out in the mirror in order to prevent Donphan stalemates from occurring. Indeed, I expect Stage 1s to see huge play in BRs, so I would definitely play test against it.
2) ZPS: We all know Zekrom wasn't really good back then due to Donphan, where it had to rely on Yanmega to give it a chance, but Yanmega wasn't enough. Now, with EP's release, the deck is going to be very good, getting both Catcher and Tornadus. Catcher allows it to be very disruptive both early and in the late game, while Tornadus easily solves the Donphan problem because he is a {C} basic that counters Donphan. So far, I can see ZPS seeing a lot of play in BRs, so this is another deck to play test against.
3) Gothitelle variants: While no one can be very sure if Gothitelle will be broke or not, Gothitelle is so far starting to receive some notice. The thing about it is that it trainer locks solely on the opponent and not you, which is a big thing compared to Vileplume. This makes Gothitelle a bit better in that you can be able to use trainer-item cards. It is a slow attacker though, but if played with Reinculus, it makes Gothitelle quite the tank. Nothing can one shot it under trainer lock except for Magnezone with 3 energies in play. Plus, if it gets 3 Psychic energies on it, it can be hitting 90 a turn, basically able to 2-shot anything in its path. It can also abuse Catchers too. Gothitelle has been seeing lots of play in Japan though, so it is quite possible that it'll be played a lot in BRs; therefore, Gothitelle is something else I would play test against.
4) Tyram: Because of its worlds showing, I would expect this deck to see lots of play in BRs. It is the easiest deck to play in this format, as it simply focuses on attacking with Reshiram and having Typhlosion get the energy onto it. The reason why I'm placing it at the bottom of the top 4 is because with Catcher's release, the deck will receive some pressure, where Typhlosions can get Catcher'd really easily. Still, if you just run Typhlosion only with no Ninetales, than a deck like that could actually do fine. Therefore, Tyram is another deck I'd play test against