DDS watchers have detected a reference to a "Type 35C" in a DDS Engineering report. New types are often first detected in these reports, a recent example being the Type 16, though not all new types that appear in these reports ever make it beyond the planning stage.
However it is thought the DDS are considering a third generation of the Type 35 to follow on from the Panther and Indy. A leaked report a few days ago states that the DDS need a bigger fleet by 2120 including 10-15 more Heavy Combat Ships than are currently in service or on order (38). The DDS refused to comment on the matter.