The other two Commander 2017 tribes are likely vampires (Sorin’s W/B/R dad there is totally an open book...) and ...Wizards maybe?
That last one is definitely more ambiguous, but someone on reddit said that someone somewhere on the internet said this is U/B/R wizards. ...clearly reliable information :P :b
Anyway, so these are two of the four revolving images that have recently appeared atop the set page for Commander 2017 on Wizards’ site. The other two are Ur Dragon and Worldcat, so it’s easy to assume these are the two main generals of the other tribal decks.
BUT who knows, still can’t rule out that one or both of these are just cards in the decks rather than the main generals.
I’m pretty disappointed about vampires, since they are a tribe that already has handfuls of multicoloured generals available to choose from as well as sanguine dumpsterloads of non-legendary tribal support to put in their decks. Though i suppose they might not have a general that specifically does tribal stuff... But ehhhh, vampires are and always have been super boring. They’re elves with pointy teeth instead of pointy ears. Bah humbug. Personal opinion mind you. I’m sure Sorin fans will love Daddy Markov ;) That art is awesome in any case!
The mystery of the last one will remain for now. Wizard is as good as guess as any really... but i wouldn’t bet on it. The art absolutely screams “Nightingales from Skyrim” to me, and it looks very Rogue-y.
It’s also possible that unlike the others, she’s a tribal general who doesn’t share the tribe she supports. She could be a cleric who does stuff with demons at the helm of a deck full of demons, for example. We know they’re not adhering strictly to everyone in the decks being of the tribe, as Taigam in the dragon deck shows.
I like to think she’s a sphinx’s disciple. ... ...but seeing sphinx tribal is getting further from conceivability, sadly ;_;
As a figurehead general made specifically for and representing a tribal deck, if that’s indeed what she is, it seems unlikely to me that they wouldn’t put the creature she’s supporting in the background of her art. So while it’s not certain i personally think it’s likely she will be whatever the tribe is. And it can’t be humans, so that leaves her occupational tribe...