I have learnt at school that you only can use the simple present for specific events in the future e.g. The bus leaves at 8.45. But when I watch an english series or a movie I also hear a lot sentences in which it doesn't follow the rules mentioned above but still refers to the future.
Here's an example of Mission Impossible Fallout:
[Ethan hunt needs to get a package of plutonium in order to save the world]
Then what? Then I assume his identity and make contact with the Black Widow. She takes us to the package.
I have noticed that in colloquial language a lot is omitted e.g. Wanna have some fun? instead of Do you want to have some fun? or Mind if I take a chair? Maybe it could be the case that in the "then" sentence 'll or will is missing. But It wouldn't explain the usage of the second sentence. Is such a usage grammatically wrong or not? I've heard from Germans that language is becoming more and more sloppy on TV but I don't know if that's an example of that or not? Can someone help me,please?