Aasimar are a non-zero possibility but I think it was settled that no, the winged character in that one trailer wasn't an aasimar and was probably an angel. As for warforged, I think it's super unlikely they'll be playable since apparently they're from a different setting. Plus I feel like that would just require way too much effort to fit into the game. If we're not getting goblins, we're not getting warforged. I don't even think Gortash's presence so much as hints at warforged by association.
