Here's why:
* No casting announcements: There have been no official announcements from Warner Bros. or any other reliable sources confirming Tennant's involvement.
* Current Batman plans: The next Batman movie is still in its early stages of development. It's unlikely they would reveal major casting decisions so far in advance.
* The Riddler's recent appearance: Paul Dano played The Riddler in Matt Reeves' "The Batman" (2022). It's highly unlikely they would recast the role so soon.
Rumors and Speculation:
It's worth noting that there's always a lot of speculation surrounding casting in Hollywood. It's possible that Tennant could be in the running for another role in the Batman universe, but there's no concrete evidence to support that claim.
Stay tuned for official updates: The best way to know for sure is to keep an eye out for official announcements from Warner Bros. or other reliable sources.