In Cambridge Dictionary Grammar – Questions: wh-questions is found:
When what, who, which or whose is the subject or part of the subject, we do not use the auxiliary. We use the word order subject + verb:
What fell off the wall?
Which horse won?
Who bought this?
Whose phone rang?
Given that might is a modal verb and we don't have a subject, are the following questions grammatically correct?
- What might happen?
- Who might win [the race]?
I'm not familiar with this structure. Maybe I don't know the role of the words or The grammar.