This is a movie that has no illusions about what it is. From the first scene (in which The Rock shoots four arrows at once, which hit four different people, knocking them across the room and, in one case, all the way through the wall and fifty feet into the air, and did I mention the arrows all had ridiculous heads like tiny buzzaws and pointy bits) it's clear that it's going to be a great big ridiculous thrillride, and anyone who doesn't like it should stop watching.
It helps that Dwayne "The Rock" Johnson is a charismatic guy. He doesn't quite wink at the audience, but there's a smirk on his face in some scenes.
My point is that this movie is a lot of fun, even if it's not entirely clear how this can be the same Scorpion King as in the Mummy movies.