Geez, Why does everybody hate Waluigi? The only game we saw him in was Mario Tennis and everybody just started hating him. Well, when I get a chance, I'll put him on Wario Castle (WC). :p
Anyway, I think the Mario brothers should have equal roles in the next Mario game. I came to this solution after seeing "Luigi is the best!" and "Luigi kicks Mario's butt!" for years on the Internet, well, ever since June 24, 1998, when I started a little Luigi website called Luigi's Tyrant. Hope it isn't my fault. ;)
Everything else looks very good.
Ironfoot
Webmaster of Wario Castle
http://whq.co-ltd.net/