Yep, any modern(ized) variant of the Flanker or Fulcrum - or even the Frogfoot - would be eagerly awaited by myself (export versions if that makes access for ED easier).
But I also believe it's going to be the F-15C made into a full fidelity DCS module, which would be nice to have - and probably could be done relatively quickly measured by how long a DCS module usually takes to develop.
An Apache DCS module would be even more exciting, and eagerly awaited as well.