maybe up the ante in difficulty but then that could alienate the new casual gamers I suppose which would hurt sales.

I'll have to agree with bigger, less linear worlds. Also, in Mario 64, you could get another star then the one you selected at the beginning because it wasn't linear. I'd like to see that again. And more difficulty is generally needed.

Add in mini-games, NSMB style. Gimme me whack-a-mole, damnit!

The only thing I could think of, in terms of gameplay, is to remove the life system.

Perhaps adding an online multiplayer mode. Not deathmatch, or anything crap. But specialised levels where the players will need to work as a team to work out and get thorugh certain puzzles. That would be fun.

Make it bigger and longer, what more can they do?

You've all got some neat ideas there guys. Lets hope someone from Nintendo visits this thread.

Would be awesome with a Super Mario Universe as a launch title for Wii 2 :D

1. Remove the story book crap.
2. Make the levels harder, by making the platforms smaller, and farther apart.
3. Shorten the time between levels.
4. More time trials to add more replay-ability.

Full voice over, or no voice over. Decide one or the other. It pisses me off when the character on screen says two words, and I have to read everything else. I didn't put in 12 years of schooling, to graduate and have to read stuff!

There isn't really a way to improve SMG, its one of the best games of all time. Maybe fewer swimming levels? When you have already saved the princess (I don't think that's a spoiler.. everyone has played a Mario game before) mailtoad doesn't need to say "Even when she's kidnapped, the princess is so thoughtful."

I would say to add in more Galaxies that involve more exploring and things like that. Linear levels are fine, but I would have really liked some more. It would also be great to control the camera at all times and make the swimming levels easier to control.