There are a few questions on this site about future sets/themes. This site is not affiliated with The LEGO Group and we cannot expect to find a statement from LEGO for every question posted.
The most our members can do is speculate, and until a certain set/theme has been confirmed or discredited there is no right or wrong answer.
It's also important to consider how valuable these questions will be considered to future visitors of the site.
Under the current Stack Exchange guidelines for closing questions these questions can be considered 'not constructive' or 'too localised':