-Destiny is rated T and not hardcore. What about it makes it hardcore? Not all shooters are hardcore...
-The game itself does not have to be huge. If they are doing a remaster of portal 2, then that can still be considered their biggest project seeing as how it's better than a simple port (mass effect 3 and deus ex)
-Once again, there is nothing stopping the game from being canceled. This may be hard for you to hear, but it is very much a possibility given (a) wii u's install base (b) wii u's audience internal development issues
and yes, TP is a possibility, albeit not a very strong one given that we already had a wind waker, ocarina of time, and majora's mask remake this gen.
-Almost every FPS is hardcore, and Destiny is definitely mature/hardcore with all that violence.
-Maybe, but I cant see why would somone want to port Portal 2 on Wii U, I dont see at all Portal 2 is that game, much bigger chances are for Minecraft than Portal 2.
-Why would be hard for me to hear that!? I all know all that. Again, I think too many time and resources were spent on this project to completely cancel, maybe it's moved to NX (like probably Project Cars) but I don't think is completely canceled.
3DS had two Zelda remakes, Wii U one, but huge dirence is that you can already play TP Wii on Wii U. I am not sure about this TP HD thing, but with this rumors I say chances are around 50%, but TP HD does fits pretty good with infos we have about Tantalus project so it's definitely possibility.