Very different from the NFL, which has had a Super Bowl cancel for each year for many years now.
Some blasts from the past:

1929 World Series with cancel from Genesee Depot, WI. Apparently they were done for each game day, same design. Not a MLB creation, but at least someone was paying attention.

From the Earthquake Series (1989). The specific team logos were used for each home game. Plus a special logo for that year's series. So if they could do that then, why not now?

I think this is connected with celebrations for the 1997 champions and not necessarily the World Series proper, so we can hope for Boston to at least do one of these.
1929 cover is not mine.