Quite franky, Nintendo are the masters of surprise. They already said they were coming out with a new IP yet have not said a word about it. They also said they would make a more original Zelda and I believe that. I feel that the horse is not dead quite yet, as mario galaxy was truly original imho.
I believe they may be the first ones to create a new console (or maybe Microsoft) possibly after 2010 methinks, and after Microsoft come out with their motion control iteration (I won't say ripoff solely for civility purposes). Sony (although milking it for all it is worth) has shown that maintaining two home consoles is possible, so it could very much work.
Square have been pissing me off for some time now. From their lack of Wii support in terms of real titles, to their console exclusivity of Star Ocean, along with their total disregard of the PC.
I know people say that PC gamers do not play RPGs, but there can't be a market unless they make a market (e.g. their force feeding RPGs to 360 owners and their push to get as many of them into the states as possible). I am planning to get a ps3 late this year, and have no intention of getting a 360, so I am praying it is only a timed exclusive.
Also it is true that they pay little to no attention to the rest of their titles. I have been waiting for a chrono break for an eternity, instead we get about five spinoffs of final fantasy 7, If I see another one I think i'm going to cut someone.
I know they said it wouldn't happen, but what reason could they possibly have to not make it? Toriyama is probably sitting around wiping his arse with ¥10000 notes, and feck knows what Sakaguchi and Horii are up to nowadays. The same goes for Secret of mana and their other titles like you said. The just ignore their stellar titles and just churn out average (in comparison) titles for the 360 to create a market.
This is starting to get lengthy, so I won't go into much more detail. Valve are gods. Blizzard are good. Sony are arrogant bastards, case in point the ps3 (but I will probably still get one this year) but neither are past their prime.
Nintendo are not past their prime yet, not in the least and I think this year will prove it. Their franchises practically raise young gamers into loyalists, and I feel that majority of the time they do enough to keep their franchises fresh (minus things like super sluggers). Things like metroid to metroid prime is fresh progression. General advancement from 2D to 3D done well is
Yes you have the Mirror's Edges and the other concepts or works, but you also have the No More Heroes, the Bayonettas, and others.
All in all your tastes have simply changed somewhat, that is all. The companies you have stated usually have not created something truly original, just something that appeals to you more than other eastern games. Perhaps before we point out the speck of dust in Japan's eye, we should check the space marine shaped plank in our own. Japan cannot be past it's prime if there are developers out there who create original works, and in fact, saying a country of developers being past their prime is somewhat racist.
P.S. I was veering towards a more obvious and definitive point but I left this open for ages and now it's gone, plus i deviated a lot so I may have been rambling/waffling. I may edit later when I am more coherent.