There are lots of reasons to believe, that Gio is pulling out of the coaster bizz:
Building Coasters is just a part of Giovanolas business. They are a huge steel manufacture, who built parts for coasters and LOTS of other things.
They have had bad luck with some ride-brokers, and they were not even credited for some rides they did (e.g. EUROSTAR).
Compared to the overwhelming reactions towards their rides, they didnt exactly have full contract-books, to build new coasters.
Check
www.nauta-bussink.com . Thats a dutch manufacturer of ferris wheels and the EVOLUTION ride at SFGAdv, The SHAFT OF TERROR is actually credited to them, and not to Giovanola.
Its all very confusing, but the ride looks great.
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i was a teenage rollercoaster designer