I really hope not. I'm curious about the ticket prices for each of the venues, because it'd kinda suck only have a small amount of matches at a Wrestlemania for each crowd. Since it's grown into such a global phenomenon where people travel all around the world to see it live, I doubt they'd pull anything like that again.
I doubt it will ever happen again. I could maybe see a match being offsite if there were some lame gimmick attached to it like WCW used to do all the time (ie: on the roof of a building, in a graveyard, in HHH and Steph's bed, ect.).
Idk call it a crazy idea but I think its possible to have one wrestlemania take place in London and another one take place in the states on the same day only problem is WWE does not have a big enough roster at all to pull it off you would at least have to have 9 matches for each location.
It won't happen again. But if Vince really wanted to, he could pull it off today and draw decent crowds for three big arenas, but definitely not three stadiums. This year WM had 5 headlining matches (Brock/Drew, Taker/AJ, Cena/Wyatt, Orton/Edge, Goldberg/Strowman). If Vince could come up with one more headlining match, and every match on the card takes place in front of the live crowd, that's two headling matches he could have in each city. The roster is big enough between Raw, Smackdown and NXT to fill out the undercard for each arena. If everything lasts 7 and a half hours like this year, that's enough action for each city .