I will make something tasty.
I'm reasonably sure that this is a natural sentence that uses 何か in a way familiar to me.
I've just been introduced to the possibility of 何か acting as the object of a sentence. In the above sentence it cannot be an object because this spot is reserved by おいしいもの. I assume 何か works adverbially. But what if I make my sentence less explicit:
I will make something (unspecified)
Can 何か be the object in this case? In what situations would you do this?