You can pack in up to 70 teams in the Historical Exhibition feature. I've never run it with more than two at a time, but that appears to be the maximum.
You could run two 64 team exhibitions (one top half, one bottom half) using my handy dandy 128 Greatest Teams of all-time (sorted by Pythag W-L% [column A-J], with teams matched up in four brackets of 32 [column L]). Take the top two brackets, and play it out all the way down to the finalist, and the bottom two brackets all the way to that finalist, and have the finalists square off in an epic battle for all-time baseball supremacy. Shoot, it's more fun than a good ole game o' Parcheesi.
And if you act now, I'll send you this gorgeous set of ginsu knives absolutely free...And...I'll even throw in a couple of Gotham Steel frying pans for the low, low price of $0.00. Operators are standing by. This offer won't last forever, and once it's gone, it's gone.