So far all we've seen from the upcoming animated show is this single shot but I'm excited! Are there any other MtG players in the community?

It's pure speculation - we've only got that title card to work with - but the bulky figure on the right has to be Planeswalker warrior Ajani Goldmane, while the glow in the hand of the smaller character could signify that it's pyromancer Chandra Nalaar. - IGN

See the video below for more of a breakdown.

There's no mistaking Ajani and Chandra would be a fan favourite, but it'd be cool if they went with a lesser-known character like Nahiri.