I heard recently that Kafka will be part of the Splunk solution in the future. Is it right? What would be its role?
If you are looking for a way to index Kafka data in Splunk Enterprise or Splunk Cloud, you can get Splunk Connect for Kafka already. See the Unleashing Data Ingestion from Apache Kafka blog post.
Were you asking about something else?
That's a pretty vague question...in what way? To do what? Do you mean as part of the platform? In any case, coccyx is right: if you have roadmap questions, talk to your sales rep to see what information they can share.