Hello, a first-timer here. Cheers, veteran Tintinologists...
Picking up on Delcourt, and some other casting from the IMDB cast list that doesn't seem to have come up yet here yet...Although I am sure someone will let me know if I missed it.
From
the IMDB cast list it indeed looks like (as someone pointed out when the casting of Salaad was announced) they'll give us a nice bit of the story from
Crab with the Golden Claws, since they have cast Delcourt and another Afgar soldier, and Allan and Pedro from the Karaboudjan (and is this "Ernie" one of Allan's mates as well?)
There was a report of some added characters, including a rival reporter and editor and an Interpol agent (I read it in the
Wikipedia article, which cites the
Hollywood Reporter).
And they seem to have worked in Castafiore as well, who I think does not appear in either
Unicorn story or
Crab.
There is also an actor listed as Mr. Crabtree, who neither rings a bell for me or appears in this site's character list. Maybe he's one of the added characters?