Though Capcom has not gone out and suggested that they should be bought out by a larger company, this week they’ve voted to end a measure that would stop a "takeover" from happening. If a larger company - Microsoft or Nintendo, for example - were to buy up enough shares to take over leadership of the company, they could indeed do so.
According to the May 16th, 2014 release of the countermeasure renewal plan, there’d been no notification or proposal of a Large-Scale Purchase of Capcom of any kind. It’s important to note that the non-renewal of this countermeasure plan does not mean that Capcom is going to sell out any time soon. All it means is that Capcom could be bought out if some larger company wanted to do so.
The non-approval of Renewal of Takeover Defense from Capcom lets it be known that in shareholder voting, the takeover defense measure did not meet its required approval rating. The release goes on to note that no matter what, Capcom will "continue to focus on further preserving and enhancing corporate value and common interests of its shareholders."
Whether or not that means they’ll keep Mega-Man in Super Smash Bros. regardless of takeover, we do not know. We’ll always have Mighty No. 9 to roll with!