There is an implicit participle in these cases. In the present Progressive Tense, you might say I am running. I’ve done many speeches, running; I am running. Running is the present participle. So I thinking your phrases implicitly say the following:

It’s going to be discussed.

You are expected to be dressed (which implies a command, but is not in command form, making it feel more formal).

I am going to be home tomorrow morning!

What are good options for a woman wanting to learn about politics?