I finally had an inter-promotional title change where an AAW guy won Maple Leaf's World Title in a 10-man Battle Royal with all the promotions except Wrestling Revolution.

I added the mod option that makes titles cross-defendable, try it and let me know if there are any issues with it :)

Oh the tag titles not showing up is a messup on my part, I will get it fixed in the next update. And for the cross-defendable titles, the way vanilla title defense works right now, is that the game can only track a single title to be defended, even in champ vs champ matches (in such cases it picks a random title to be defended). And the fed of the title is determined by wrestlers in the match, that's why the Reward button is blocked in crosspromotion matches, because it can't determine the fed this match takes place in, even if you wanted to do something like Mask vs Mask. Instead, I think I will add a toggle in mod options that will track and force every champ in the match to defend their titles.

I'll also say that this is pretty tricky for tag titles. Tag Champs don't come out together with the titles, and for singles, only one brings out their title if both champs are in the same match.

I'm not sure. I guess I can try to make it work

This is a great mod for, like you said, running exhibition e-feds and having different titles. Do you think there'll be a way to make titles cross-defendable?