A Plague of Loki
Loki may have tried to enslave the planet, but Tony sure doesn't plan on letting a stupid little detail like that come between him and the (admittedly very remote) possibility of Happily Ever After with his prince. Three months after the failed invasion in New York, he seems to have found the way to give their relationship a second chance. It just involves interplanetary travel, an abundance of magical hijinx, and an attempt to outsmart a race of ancient pagan deities. No biggie.
This story is a direct sequel to "Are You There, God of Mischief? It's Me, Tony".