I heard a rumor that they aren't going to make anymore Mario games for Wii and there going to wait until they make the next counsel to make them so that they will go crazy for the Mario Games. But I heard this from a kid from church who tends to lies a lot. So it's probably not true.
There needs to be more new original (not saying Mario isn't original) heroes imo. I don't care so much for Mario, but I hope they make a new Luigi game.
I really doubt they'd ever stop making Mario games. They probably immediately start a new one every time they finish one. Yeah I'd think they would shoot to get one more out for the Wii before the next generation.