-lots of stability and stuff-
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I think it worked, at least packing a game completely ibto the package. I used a NTSC-J game repack that is confirmed 100% functional, but black screens on my PAL wiiu. You are the wrong perdon to tell this since you are just building a tasty easy to eat cake from incredients others have built.
But: I think wii games need a FW patch or something to force video modes or something that is causing US and JP games in few rare cases to black screen on boot, while they work fine on NTSC systems. I am fairly sure it could be that since the FW image on virtual packs of wii games have it's own FW image seperate from the main vWii nand and all. I could be even off, I just have a well educated hunch that regions and maybe video signal modes have something to do with it... Probably possibly.
Depends, WBFS handling has been reworked for more stability (if that's even your source), so give it another try. Post the logs here if it fails. I can also test the games if you like.
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@ploggy has identified an issue with the homebrew ISO base that may be causing some of the speed issues we are seeing with Nintendont, I am testing with a different base now. Thanks for investigating this.