2 minutes ago, LennoxPoodle said:Too get back to the actual topic:
I don't want to get the Han Solo we see at the beginning of ANH. A (good) story needs character development so we need the protagonist BECOME the egoistic, professional and self observed personality all of us know and love.
Based on what we see in the trailer it might go this way: Han initially is a somewhat idealistic, empathic and caring character who enlisted to make a difference. After getting kicked out of the academy he keeps his attitude and becomes a criminal with a heart. Qi'ra (and/or Harrelsons character) then uses those traits to get close to him for an eventual betrayal which emotionally hits Han. This could make him getting disillusioned, not getting attached, only watch the profit and shoot first with his "good traits" being hidden deep in his core until partly resurfaced by the Rebellion and Leia.
Enlisting to make a difference seems too uncharacteristic. I think it's more likely they take the Star Trek reboot approach here. I know. I know. I'm crossing the beams. But I could totally see Solo as a cocky rookie who gets kicked after he disobeys an order, maybe even to save/prevent something bad, but in a cocky way. Then he takes his skills to an alternative profession where cockiness and skills are appreciated. Smuggling.
I do like your idea on betrayal though. I feel like there needs to be a good one. He def has trust issues eventually, so that's gotta stem from somewhere. Not to tap Star Trek again, but abandonment as a child could do it.

