It's also not going to be that expensive, given that it's already been edited, music has been composed, sound effects have been done, visual effects probably now work out cheaper with CGI. The big difference from the TOS remaster is that someone is going to have to look through the vault and reassemble the episodes from the film stock before it can be remastered and new effects applied. The truth is that we don't really know how much it will cost, so it's over to CBS to make it happen. Or not. As long as they don't throw anything away in the future, there's a good chance it will happen eventually.