Can't say whether or not we're working on new Variaxes (would love to revisit but there's a LOT of pushback, due to its relatively low sales), but I would imagine we'd design it with a Nexus port, negating the need for Expand D10.
There are a handful of new effects in our repository, waiting for inclusion and validation, but Sound Design's main priority is nailing the 22 Agoura amps for 1.0. We almost included a new effect in 1.0 that wouldn't work in Helix/HX (due to feature constraints, not DSP), but pulled it at the last second to make sure it gets the proper attention.
Presumably, the new effects (except the feature-constrained one) could also appear in a Helix/HX update.