Honestly if you read the actual email I think there could be significant legal trouble ahead.

Spencer talks about how the main barrier to acquiring Nintendo is that they sit on a mountain of cash. He calls that unfortunate. He then proceeded to state a company with connections to Microsoft had just bought a lot of Nintendo shares, and how they could work with said company to make such an acquisition a reality.

The company in question publicly bought a massive amount of Nintendo shares. They then proceeded to pressure Nintendo to invest more capital instead of sitting on the cash pile they have now. They did this under claims that such a move would be beneficial to Nintendo in terms of ROI. However, it would also result in Nintendo being more vulnerable to an acquisition from Microsoft if any of those bets don't pay off.

In short, it could be argued that Microsoft worked with investors to tank Nintendo so they could buy it. That's a huge deal and will probably result in a shitstorm.