Marvel is usually tight-lipped about what’s in store for their actors in the future. Most recently, the likes of Anthony Mackie and Tom Hiddleston have stated that they don’t know what’s next for their Marvel characters, although it looks like the future is still open to these two. The fact that ‘WandaVision’ doesn’t have a definitive ending for White Vision seems to suggest that there’s more to it for him, and that it could still happen. However, it is clear that Marvel is keeping that very secret for the time being.
Some might quickly assume that Bettany is lying about what future he might have in the MCU, as actors have a habit of avoiding saying certain things until an official announcement is made. While that’s possible, in many ways WandaVision also brings a sense of an end to Bettany’s MCU arc and his contract. White Vision could easily bring him back, but until Marvel actually confirms that, things are still very vague.