http://www.johnnys-net.jp/page?id=te...221&lang=en_us
Honestly I don't think Let's Go!! will be released as Kisumai's next single but I wouldn't be surprised if a new single will be out next month followed by a new album
Kisumai are going on tour in mid May & maybe Let's Go!! wouldn't make the cut should this release pattern follows ?
Given how comical The Lego Batman Movie is , Let's Go!! probably might be a happy go lucky song , would be really odd if it's a dark moody no.