Don't be naive. Just because a couple (or a couple hundred) guys on the internet want Ruger to build another shotgun, doesn't mean squat.
A company has to have a market of tens of thousands if they are going to invest money in engineering, tooling, vendors, and production facilities to come out with a new gun.
The autoloader market is flooded now with shotguns: high-end guns like Beretta and Benelli, mid-range guns from Remington, Winchester and Browning, and low-end "value" guns from Mossberg/Maverick and dozens of Turkish and Russian plants. We already have dozens of choices of brands and hundreds of choices of models to choose from. Ruger would be facing a tough market and they know it.
I'd be very surprised to see them come out with a new shotgun.
But if they did, and it was in the $1600-$1800 range (i.e. a target-type gun), I'd certainly consider buying one....