Sony Announced Their Event Because of Nintendo’s disappointing financials yesterday.

[Conegamer]

I think the OP is just a little off the mark here.

For one, at least half the things suggested to be shown will NOT be shown. Why ruin their E3? There's no point and they wouldn't want to take the edge off the PS4 with Vita news, and vice versa.

Simiarly, people aren't just going to forget about what's coming for the Wii U because of this announcement announcement. Especially if it's priced above that of the Wii U, and if very little is shown (we'll be lucky to get 2 of the listed games in the launch window).

Finally, it's just coincidental timing. The announcement has been coming for a while, and today is just the day it fell. I doubt Sony care that much about the Wii U, especially when they know they'll struggle to match the sales shown in that report.