what do you think will happenUsed to ask someone to predict or speculate about what will happen. Depending on context and tense, it can also mean “what do you think happened?” or “what do you think would happen?” The polite form is どうなると思いますか.
JA: このまま続けたら、どうなると思う？
EN: What do you think will happen if we keep going like this?