I grew up on reading Tintin/Asterix too, but I don't know.
Tintin holding and shooting a pistol on someone. That's not Tintin.
When I first saw the trailer for the video game (inspired from this Spielberg's movie) I was like "WTF this has nothing to do with Tintin except for the name and the look of the characters !!!"
I'd love to be surprised and that the movie finaly ends up really good. But I'm not shifting any high expectations for now as it is, imo, highly unlikely.