Any company should buy it

Honestly, Sony, MS or Nintendo wouldn't benefit. Capcom is struggling selling games for PS, Xbox and Nintendo consoles. What do you think would happen if you buy a company and your first decision is to stop making games for all the other companies and potentially cut your game revenue, the one that was already low, by half or two thirds? Capcom stock (yes, the one was bought one week before the annoucement) would plummet and you would be stuck with that forever because it became unsellable without huge losses. It's not like buying IPs from THQ: there you got nice IPs without dealing with thousands of workers and a sick management structure. Buying a sick company is buying problems.

Forgetting all this stuff, I'm a Sony fan. But I don't want Sony to buy it. I know that MH could actually save the Vita, that Street Fighter and RE exclusivity would do a huge deal, but I don't want that Nintendo and MS gamers lose this games. Only because they didn't buy the same console I did, it doesn't mean that I want to see them get screwed. If someone buys Capcom, I hope it is a 3rd party publisher that will keep things like they are. Anyone that wants that their company of choice buy it is just being selfish so they can have something to brag about in an internet forum.

But wii u is the least popular console this gen, those capcom Ip's need a better audience!

Your idea is obvious, your reasoning isn't being shown. Part of an argument's structure should include direct examples that support, admittedly I don't know what English speaking countries other than Ireland call 'teaching English' but I'd imagine it still involves teaching you the standard layout for arguing a point, try to think back to your school days and refer to that - its finally got a chance to be useful! 

You provide an interesting comparision but in the case of those JRPGs you are, by naming their genre, immediately providing a basis for comparison for how they could have sold off of Xbox. You need to provide a similiar a basis of comparison for Rare's Xbox games that compares them to N64 or Gamecube games that sold well. 

I'll even help you more by providing a list of the top twenty selling Gamecube and N64 titles respectively and in order of how well they sold on their consoles. - You believe in your argument, sell us on it!

N64 --------------------------- Gamecube

Super Mario 64 --------------------------- Super Smash Bros. Melee

Mario Kart 64 --------------------------- Mario Kart: Double Dash!!

GoldenEye 007 --------------------------- Super Mario Sunshine

The Legend of Zelda: Ocarina of Time --------------------------- The Legend of Zelda: The Wind Waker

Super Smash Bros. --------------------------- Luigi's Mansion

Pokémon Stadium --------------------------- Animal Crossing

Donkey Kong 64 --------------------------- Metroid Prime

Diddy Kong Racing --------------------------- Sonic Adventure 2 Battle

Star Fox 64 --------------------------- Pokémon Colosseum

Pokémon Snap --------------------------- Mario Party 4

The Legend of Zelda: Majora's Mask --------------------------- Paper Mario: The Thousand-Year Door

Star Wars Episode I Racer --------------------------- Mario Party 5

Wave Race 64 --------------------------- Sonic Mega Collection

Yoshi's Story --------------------------- Star Wars Rogue Leader: Rogue Squadron II

Pokémon Stadium 2 --------------------------- Resident Evil 4

Mario Party --------------------------- Pikmin

Star Wars: Shadows of the Empire --------------------------- Kirby Air Ride

Perfect Dark --------------------------- Super Mario Strikers

So now you simply have to tell us, what did Rare make under Microsoft that slots in well with those games? - Please finished your argument, its driving me crazy! XD 

(Also, holy crap Mario Party is goddamn FIFA and CoD esque.)

EA would turn Mega Man into a Battlefield clone though..

I hope third party buy them it will suck to release those big games just on 1 console

You're over thinking this. The types of games Rare made on Xbox platforms would have appealed to the Nintendo audience more. Simple as that.

That's evident simply based on how Rare games have done on Nintendo platforms and the type of games that tend to do well on Nintendo platforms.

The first thing is about Megaman. If Nintendo buys Capcom, Megaman will back to action.

In other hand, I think franchises like Breath of Fire will be buried.

I'm asking for examples, without giving examples you might as well say 'most planets in the universe are made of cheese'.

No, I don't see Nintendo making anything like that in the near future, nor do I want them to. I have that kind of experience on other platforms.

But going back to the subject, DMC is not developed by Capcom either. It was part of a development contract with Ninja Theory if I remmber correctly.

And it's pretty much evident that Nintendo also wants to cater, at least somewhat, to more mature audiences. They published Ninja Gaidan 3, and are publishing Bayonetta 2 and the recently announced Devil's Third, which by the way has nothing to do with Sega.

So yeah, I could see Nintendo handling Capcom's more mature franchises very well. They're not afraid of the Mature or PEGI 16/18 banner anymore.