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By the time either of these games release, both PS4 and X1 install bases will be at least 3 times the amount of Wii U. Looking at the market trends, getting a port of these games would prove difficult. 3rd party companies pay attention to market trends and what is happening with support. Ubisoft support is a rocky boat these days with Watch Dogs Wii U not releasing along side PS4 and X1 versions. WB's cancels DLC support for Batman AO. With the writing on the wall, SE is not going to look at the market, look at other 3rd parties dropping support and say "Okay, let's put our top 2 most anticipated games on a sinking ship"
Edit: Along with my above points, Rocksteady's new Batman game was just announced as PS4,X1 and PC only. 3rd parties will be looking at this trend.
