I'm sure everyone saw this. 'Lei Gong' for Yu Jing. Looks like a speedster. Oh, and 'Axl Steel' wasn't on the list of available aristos in that update.
Lei Gong has already been teased as he's one of the expansion heroes of Infinity Defiance, his model for that game is his older iteration (Infinity and Defiance age set a decade or so later than A!) but they also showed some art with a hawklike half helm (think Pharah from Overwatch) roller blades on his feet, and "wings" that fold into a "demolishing" wave motion cannon. The next expansion will have double sided character cards with Lei Gong's having one side representing the cannon being deployed and the other side being "mobility" mode, Bostria has said that the A! model will be in cannon mode. The article didn't mention Axl because he's from the Human Edge and not one of the major nations, the same goes for Parvati and Hippolyta.