Didn't the Wii U sold really well last Christmas? The drought started January 2013 iirc.
I think it did yeah but retailers were expecting another Wii situation after the initial Christmas success and over ordered. It didn't sell again until recently. It's going to be an uphill battle for Nintendo to regain the confidence of retailers with the Wii U outside of Christmas time. It looks like they have the games though, so I think it's going to happen.