Are we sure he's Zuko's son? Didn't the Korra game say the he had a daughter? It could be his grandson.
And Bumi seems to be using the same uniform as Iroh. Does this mean he's general too?
Then I guess Capcom made a good choice if the reaction is so much better.
There's many people who'd prefer an anime-style spin-off over a realistic shooter so It makes sense that they're getting more excited over this than LP3. And it's not really that uncommon for people to be more interested...