The toon was amazing, I was so pleased to share with my younger cousins.
Amazing, yet tragic in its demise.
If I recall, it was canceled not because of its ratings, but because the entire Jetix network of shows couldn't reach a contractual agreement, or some such thing like that.
Someone (I think one of the creators) said the 3rd season would have had Wildfire.
It briefly turned my kids into Legion fans, but when it was canceled, they "reverted" to Teen Titans. I still have all the McDonald's happy meal toys (my body forgave me).
Ah well, such is Legion fandom. We always get table scraps, never QUITE the banquet.