Yes, any planeswalker can be your commander in Brawl, regardless of what the text on that planeswalker says
Ich-Tekik, Salvage Splicer Ich-Tekik, Salvage Splicer is much like Slurrk, All-Ingesting, but the Salvage Splicer can be played a bit earlier, golem typal payoffs could mean upside, and putting artifacts into the graveyard often happens far more than creatures going to the graveyard
The only cards that might be worth anything in this set are the six Anniversary-stamped cards, and even then I wouldn't expect them to be big money cards
Arch of Orazca seems like the most profitable way to gain advantage by having a lot of extra mana, but I could see playing a couple of small packages that combo well with Hour of Promise that allow you to do other things
Team Rocket has the best original set of Pokmon
With monstrosity 5 that can help do some serious work