I suppose I can at least be cautiously optimistic if it's being handled by a combination of HBO and Nolan. I still appreciate his attempt to elevate the (rather dumbed down as of late) science fiction genre with Interstellar.
One thing that helps Foundation is a lack of actual space battle scenes, which gives some more flexibility when it comes to budget. If I remember correctly, what battles that did occur happened "off screen," discussed after-the-fact by characters rather than narrated in real time.