Granted I've not watched the Madalorian but the clips I have seen seemed to feature a lot of space ships flying around, different worlds and Jedis and stuff. I'm talking about this being a
classic western but in the SW universe, just with lasers instead of bullets. Ben as the mysterious stranger that wonders into a Tatooine town and clears up the bandits.
I kinda didn't want to see Luke as a child either. Maybe a small clip of him holding the hand of Aunt Beru from a fair distance, in a market place or something but nothing significant that draws attention to him wanting to become a pilot or other
It is firmly established that Luke knows Ben by the time of SW77 (and to go off on a tangent... why isn't this show called "Ben Kenobi" because that's his name in the OT before it was changed in the PT), at least as well as one knows a neighbour in a disparate farming community. He says something about wondering if the Droids mean "Old ben" and then also reveals he knows where he lives and knows his rep, then later instantly recognises him when he wakes up from the Tusken attack saying "Ben!".
So it would be kinda weird if this new show didn't take the opportunity to show some of their early interactions. I'd picture it a bit like the relationships between young Bilbo/young Frodo and Gandalf e.g. just some interesting old dude, a local character that can do fireworks/levitation but they never suspect he's some sort of all powerful mage/jedi protecting their community.
By the way, I love the Pac-Mac easter egg on the poster. I wonder how they'll work that cameo in?: