I like the "tie everything in idea" expect that it realistically won't happen (at least for awhile). Ironically, if you're trying to suggest making an "epic-storyline" it would be nearly impossible to tie everything in. And even if they made the game with no storyline it would be weird. Besides that, it would takes years to re-create every place Mario has even been in (or main places) in 3-D and with a matching style. How would SMB1/2/3 look in contrast to the SMS level? Also, for the game to make sense it should only include main games. But even with that, think of how limited it'd be. The first 4 games were all side-scrolling with minimal story and the next games were all 3-D and I can't see it being interesting if they combined them into one game.