Yes, and most people who know me know which game I'm gonna say...
[HEADING=1]Megaman Legends 3![/HEADING]
The game was originally the entire reason as to why I purchased a 3DS, the other being that Luigi's Mansion 2 was being made for it. So I got it at launch and was helping out, submitting crudely drawn Reverbots and voting on the character designs. I was extremely excited because after 10 years I'd finally be getting another Legends game, and possibly closure for the series which is something I always want from a series. Then E3 2011 game, and my hopes were dashed by the announcement that Legends 3 was cancelled. Then Capcom of Europe's CEO drank the stupid juice that EA and Ubisoft have been drinking and said that it was cancelled because "there wasn't enough fan support" which just kicked dirt into my face.
Plus, there was the fact that the prototype that had been completed was not going to be released, leaving it that only one man outside of Japan has ever played it, and that was someone from Destructoid. So now I sit here, sad, that my first ever Megaman series still has no closure. Hopefully with Megaman being in Smash 4, and his final Smash including Volnutt, Capcom will see the stupid mistake they made and will resume development. But then again, I see that as likely as Nintendo removing region locks from their systems. :/