One wonders if they'll follow the path stadiums seem to have and fill unused seats with cardboard cutouts--which, as long as they'd have their families' permission, might be a way to get Johnny Olson and Rod Roddy back to the studio, as it were, by putting cutouts of them close to contestants' row.
The good news at present is that we now have about 4 vaccines candidates in the final phase of testing, with perhaps the same amount of others close to that point. They of course should not be rushed, as we need to make absolutely sure anything that does hit the market is completely safe and effective, but I think simple odds hold that at least one of them should be (and if the rest are as well, no need to stop development after the first one's available, as the more different types we get out there the better). So I think the best case scenario might be that we have at least one vaccine ready for the public by December/January, with about 3-4 thereafter before we'd see solid case declines. If we're doubly lucky, by that point we'd be seeing either the early stages of herd immunity beginning, the virus starting to mutate into a more benign form much like the coronavirus strains that cause the common cold, or both. All we can do till then is hope for the best.