More than likely it didn't. Even with all these new releases at the top it's still a rather low week.
Injustice Wii U released a week later than the other versions in the UK. Also, no pre order incentives and no guaranteed DLC. It's like they wanted to check every possible box to make the game bomb as hard as possible on Wii U.
Edit: I almost forgot, they also didn't send out review copies for the Wii U version.
Ongoing bet with think-man: He wins if MH4 releases in any shape or form on PSV in 2013, I win if it doesn't.