You're talking about this year though, EA are preparing for the next eight. Those sports games will be running on an engine that is presumably beyond the technical feasibility of the hardware. EA are only using two engines for their next-gen games, the sports one, and Frostbite 3, and they said FB2 wasn't even up to snuff on there.Wii U should absolutely be viable for them, with even the minimum of effort they brought Mass Effect 3 to the system by launch. With post-launch devkits/SDKs they should at least be bringing their 360/PS3 versions of all their sports games to the WiiU. Either one or both of the below is why they won't support WiiU:
a) They think that they can influence the market in the direction of their choosing by withholding games and playing hardball. As they tried (and failed) with Steam. Microsoft's approach is a wet dream for them and PS4 and PC are trivial to support, so it's time to jettison WiiU for not playing along, customer base be damned.
b) They're transitioning to a new CEO and have blocked any investment in areas that will not see immediate short-term profit in time for the appointment of their new CEO. That means no long-term attempts to build customers on WiiU. They want a financial year where they can report profitability and use stuff like the removal of online passes to improve their disastrous image leading into the naming of the next CEO.
I realise there were serious mistakes made by Nintendo with WiiU (though none of them as boneheaded and damaging as xbone DRM), but if EA can't count it as a viable platform then EA have serious problems.
I imagine they could just give it the Vita game, or whatever, but that's just going to cause terrible PR every year when people get it and bitch online.