Originally Posted by
Reality
Marvel shares the rights to the Skrulls with Fox, they just don't have most of the named characters. As Fox doesn't have access to the Kree, though, they still have an intact Hulkling.
As for Wiccan's origins, I would just sever them from Scarlet Witch. They barely interact beyond his fanboyism anyway, and we won't be getting a "search for Wanda" arc after a Disassembled type thing anyway, most likely, so it isn't a huge loss.
For a YA movie I'd adapt the Mother arc of the last volume and use it as a reason why the team was formed. Then you can have Wiccan's origins come straight from being the Demiurge. No Wanda and Vision convoluted baby stuff required.