I am not a fan of smaller races, but that seems to be the only type of companion we miss. Not excited for them being a bard as well, we'll see. I doubt we'll get two same classes or races as origin characters, so that leaves us with...
Half-orc, drow, dwarf, halfling, gnome or dragonborn.
As for classes, those are ranger, sorcerer, bard, monk.
I'm thinking that the fact they were withholding any info on the last origin character they are from the recently annouced races/classes.
I would be out of my mind with a drow ranger origin character(since they confirmed gloom stalkers!), but statistically speaking it probably will be a smaller race. So maybe a duergar?
