Here are some ideas:
How will small area estimation be important in statistics?
How will causal inference be used in statistical analysis?
What is the best statistical analysis for measuring wage inequalities between men and women?
How will big data influence the field of statistics?
How will mathematical methods of studying complex biological networks be important in the future?
How can statistical properties of elastic waves help monitor earthquake risk?
How can statistics best account for missing data?
What is the cutting-edge in research on statistics about machine learning?
Can machine learning replace people doing statistical analysis?