People are starting to act like the Demon Soul's faithful here. People calling out the Galaxies for not having enough content? *Mind Blown*
I'm fine with the state of Mario. Maybe people are asking for additional modes and attractions outside of the main game? At any rate, it's Zelda that needs work, but that's a whole different discussion. Bottom line is, when it comes to Nintendo IPs, Zelda's getting stale and Uprising is a blast of fresh air. For my tastes, anyway.
Regarding the whole Top Five Games of All-Time... Hard to say if Uprising is in the Top Five... But what I know is I never grow bored playing Uprising.
With most games, even great games like Galaxy, there comes a point where I feel, "OK, that's enough for now," even in the early days of owning the game when the hype is fresh. But for me, Uprising never reaches that point; it's when external factors like the rest of life come into play that I have to (grudgingly) put the game down. I think the trick with Uprising is "downtime." What I mean is, I can replay a mission from single-player, and I always have fun since there are so many episodes with so much content and the scalable difficulty level and the various weapons and powers that make for different experiences. Then, when I'm done with that, I enjoy some downtime: I'll toss some eggs for idols, or peruse the idol gallery and immerse myself in the lore, or listen to the music player, or scope our achievements, or study the possible fusions available to me, and experiment with different weapons... Then I'll hop online for a few rounds, have a blast, and suddenly I have new loot, and more eggs, and the cycle begins anew... And when you love every aspect of the game world like I do -- the characters, the worlds, etc -- it's a cycle you love to go through.
I guess only time will tell for sure, but I feel comfortable saying this is up there in my Top 10 at least, alongside Majora's Mask, Metroid Prime, Resident Evil 4, Super Mario Galaxy, Amnesia, Arkham City, Red Dead Redemption, and some other choice games.