Yeah, WWX is an entirely different timeline. They established a whole ES multiverse plot through post-campaign events (though there weren't any direct references to original or Gold).
If you count the collab event, it is also connected to Escalation and Rance universes.
Bringing in combat-related stuff isn't "impossible", technically. It was always a question of a significant amount of manual work, which our team wasn't ready to do. And it became practically impossible when I lost contact with our programmer.
Technical note: all scripts, related to battles/characters were handled on the WWX server's side. So implementing any battle formations, characters' skills would require manual re-creating of those with Gold scripting language, based on their external description. I didn't research it much, so I'm not sure if every skill can be replicated with existing Gold mechanics.
Potential work can also be divided into two different parts:
- re-creating WWX characters to use in the GOLD campaign: Implementing all exclusive WWX characters would be an enormous task, but re-creating a handful of WWX units is doable.
On that note, there's a Chinese mod in development that brings some WWX characters to the Gold engine (there're links in the WWX thread on VNDB).
- replicating WWX battles: After playing an extensive amount of WWX, I think only a handful of event/boss battles would really deserve implementation. Even that would require some re-balancing due to differences in in-game progression systems.
The rest of the battles (campaign, non-boss events, character events) would be too easy and require really heavy re-balancing.
