Interesting. I'd be suprised if it is delisted. I mean, there's already no Busa, GSXR600,750, and now only 1 650 strom? Their line up is alreadys sparse by comparison to most other manufacturers - taking out another would be suicide.
As for the Dr Big1200 - I doubt we'll ever see that - (though 1188cc is possible with this engine). Suzuki are not that bold. New Katana proof in point.
The recent spyshot images did show a 1K with new beak style and some strange blackboxes attached to the left hand engine cases. Which I hoped was new VVT system they patented for the 1K lump - meaning there's more to come. But with Suzuki you never know.