Looking far off, new Wii U titles in late 2016/early 2017 will require having firmware 5.5.1 or above, which means Loadiine HAS to support 5.5.1 at some point this year to play the newer games. I just hope the hacking scene can find an exploit in it already and help the thousands of us who accidentally updated to 5.5.1 already.
Uhm that doesn't have to be true.
That's only true if there's something in FW 5.5 or higher that's required to run the game.
AFAIK 5.5.0 and above only contains some fixes for kernel/browser and maybe some cosmetics changes and removing that App whose name I can't remember
I do hope for the people on 5.5 and above do get their exploit though.
Hopefully for them there does come a FW upgrade tomorrow that fixes the kernel exploit so it will get released but don't get your hopes up.
Just block it in case it does come.