There's no official announcement about a new Transformers movie after *Rise of the Beasts*. However, the franchise is very popular and there are rumors of future films, though nothing is confirmed.
As for Eragon, there was a live-action movie released in 2006. A television series adaptation for Disney+ was announced in 2020 and is currently in production.
It's important to stay up-to-date with official announcements from the studios to get the latest information on both franchises.