After the release of "The Chronicles Of Narnia: Voyage Of The Dawn Treader" in 2010, there was some question of where the franchise might go next. In 2011, Walden Media honcho Michael Flaherty revealed he was aiming to negotiate with Fox and C.S. Lewis‘ estate to get the rights to "The Chronicles Of Narnia: The Magician’s Nephew," which is more of a prequel story, rather than a direct follow-up to ‘Dawn Treader.’ That never happened, and a couple of years later, it was announced that "The Chronicles Of Narnia: The Silver Chair" would be next. That movie also never really materialized, but it seems the plan is still there to bring it to the big screen.
Speaking at the Television Critics Association press tour, producer Mark Gordon told Collider, "We’re hoping to be able to make the movie very shortly." However, they will be starting everything over from scratch, with none of the previous cast members involved.
"… it’s all going to be a brand new franchise. All original. All original characters, different directors, and an entire new team that this is coming from," he added.
So yes, King Caspian (originally played by Ben Barnes), Eustace Scrubb (originally played by Will Poulter), and Aslan (voiced by Liam Neeson) will all likely be recast, as the franchise looks to get reinvigorated. I can’t say I was ever really invested in the books or movies, but many are, and if you’re one of those folks, share your thoughts on this news in the comments section.