A new card was just revealed on a Chinese HS forum NGA (Source) - Plague Scientist. At first glance, it seems to combo well with small, disposable minions (e.g. Fire Fly) or cheap minions with Charge (e.g. Southsea Deckhand, Patches the Pirate). In a dire situation, it also might be used to give a Poisonous keyword to a Wild Pyromancer, which then will be able to clear the whole board with a cheap spell. It might be a worse version of Wild Pyromancer + Equality from Paladin, but Rogue has no other board clears, so it's hard to say how playable it will be.
Knights of the Frozen Throne
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