I can't say I'd be first in line for one, but I do think it's a reasonably good idea.
It seems like a common complaint I have heard about the Bearcat is the extraction. I often hear it is more irritating than a Single Six; the smaller size makes it an arduous task.
The top break format would go a long way towards addressing this.
I'm not sure if they would sell a boatload of them, but from being around this board and a couple of others the whole "bring back a small and handy top-break .22" thing comes up enough to where I believe it would hold it's own. As a comparison, the new Shopkeeper - while cute as a button - seems to be an answer to a question nobody really asked and is reported to suffer even WORSE from the whole arduous extraction issue of the original Bearcat. Yet Ruger saw fit to make them a standard catalog item. So when you look at it that way... why not?
That's my 2¢, anyway.