Here is an earlier version of Akumajou Dracula for the Super Famicom. The title screen is missing a bit of its background.

And the map below looks a bit different. The released version had an isometric viewpoint, but it wasn't filled in like this one.

Here's Super Aleste (well, you can see that below). The title screen and a lot of in-game graphics are different.



Axelay also looked a little different from the released version.

Here's Bio Force Ape, previewed in Nintendo Power, but never released.
And here's Ark Hound -- Contra Force to us in North America. Wisely, Konami didn't release it in Japan, but they still dumped it on us!