It does suck for PC gamers, thankfully I have a Wii U so I'll be able to check it out.
It's been out in Europe for ages, yet it still hasn't arrived here in Aus. First they missed classification here, but it has since been approved. Since then they have been waiting for the switch to be flicked so Aussies can purchase it from the store. Same has happened to Mighty Switch Force HD.
I'm sure the new content won't be completely mind blowing.