Best hope is for Mayday to be allowed to return home for a bit than brought back later when Marvel is a little less anti-marriage...
There also seems to be a one Mayday rule as we haven't seen Earth-X Mayday since she was forced to serve Kang to survive the Incursions. Earth-X Mayday wasn't even in Spider-Verse either, course that may be because Kang has her stuck serving as one of his elites.
Wanna see Earth-X Mayday's hanging plot line dealt with eventually and not simply forgotten about.