I've already had my perfect D&D movie in Your Highness so either way I'm good.

But in seriousness I'm fully expecting it to be awful - I'd be surprised if it was anywhere near as good as the Warcraft movie and that was a solid "Meh".

As people have said I'd like a D&D movie to have some focus on the players, not TOO much, but similar to the way Princess Bride was filmed with the cuts to child and grandpa - occasional 4th wall breaks to the table with reactions etc The "DM" actor doing the Narration in the movie - stuff like that. Embrace the people playing the game side of things rather than just the epic fantasy movie vision.