First is probably not deckbuilding. It will be a discover mechanic. Kobbolds versus murlocs doesn't need much to be fun. No clue about the prisoner Jesus Nefarian casting mage portal. The next reminds me of Yugioh for some reason,the design looks similar. The last could be something along the lines of blind play where you know the cost of the card and if it is a spell or minion and nothing else.
First image .... hmmm. Three Card Monte?"Keep your eye on the shredder ..."
I don't see a Murlocs Vs Kobolds Brawl only because there are only TWO Kobold card in the game, the one o the dragon mirror looks interesting, I only hope the Taver Brawl of this week to be something awesome... and that involve class because tomorrpw I fihish the gold for the second wing of LoE, and I always felt tavern Brawls ends considerably faster.
That bottom image with the ape you only see when you're starting the game the first time and running through the starter missions it's one of the backgrounds. So not a tavern brawl, I think it's the mukla fight