PrivateRyan
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Chief technical officer, Oles Shishkovtsov, explains why Metro’s sequel won’t be appearing.
“[The] Wii U has a horrible, slow CPU,” explained Shishkovtsov. “We had an early look at it, we thought we could probably do it, but in terms of the impact we would make on the overall quality of the game – potentially to its detriment – we just figured it wasn’t worth pursuing at this time. It’s something we might return to. I really couldn’t make any promises, though.”
Despite Nintendo’s console offering Metro: Last Light new experiences to its players with it dual screens, when asked Shishkovtsov was adamant that the Wii U would ever seen Metro: Last Light when asked directly.
“We had an initial look at the Wii U, but given the size of the team and compared to where we were last time, just developing for the Playstation 3 is a significant addition.”
Source: http://www.nowgamer.com/news/1687689/wii_u_has_a_horrible_slow_cpu_says_metro_last_light_dev.html
Edit:
A DICE designer has also commented: