I've been toying around with the idea of a fangame spin-off that details what happened directly after the Time Crash, when Chronpolis and Dinopolis fought. It's just an idea, and unlikely that I'll ever be able to make it an actual game, but it's interesting to think about.
I was wondering if anyone has input regarding the subject. Mainly I've been wondering, how long did the fight last? Did Dinopolis fight back, and if so, how? The Dragon God was a thing, it's not unreasonable to think they had more dragons at their disposal. Perhaps dactyls, which they could have used to combat the fighter jets of Chronopolis.
I've always assumed it was FATE that created the elements in Chrono Cross, which would be an interesting plot point as the Dragonians of Dinopolis possibly had that power innately, and FATE derived the elements from that. But the Compendium states that elements were in fact created by Dragonian survivors at so-called power spots. I'm not sure if the game states anything concrete about this.
I dunno if this belongs here as it's not exactly a fan project (yet), just an idea.