For what it's worth, the only thing Tansut was able to nail down was that a Dragon Quest character is on the way & that one of the characters (likely said DQ rep) has gender variants.There will definitely be a Smash reveal and it won't be Erdrick. Maybe another Dragon Quest character, maybe someone from another game entirely (Sora from Kingdom Hearts is my guess), but I don't think Erdrick is in at all.
Please don't bother me with quotes about "leaks" and datamines.
Though honestly, it's hard to imagine who "Brave" could refer to outside of Dragon Quest. Most of the ideas tossed around seem like major stretches.