For Deadpool 3, i would love to see Howard The Duck co-star and have it set in Mojoworld with Mojo as the villain plus co-starring Firestar (whom everyone remembers from Spider-Man and his Amazing Friends), Morph (whom everyone remembers from the X-Men TAS) and Longshot.
For Guardians 3, i'd love to see the Starjammers with Hepzibah and Corsair now that we accept outside species/outside human race love in fiction nowadays but would love to see the reverse where the human male is the lover and the furry/xeno/mutant is the female as there's way too many human females with xeno/furry/mutant males (ala Shape of Water, Wolf Children, any Beauty and the Beast story) which the reverse feels fresh. And also have Silver Surfer co-star.
"Unicorn, mermaid, sorceress, vampire, gargoyle, werewolf, elf...no name you could give her would surprise or frighten me, i love whom i love"-Prince Lir in The Last Unicorn (book and movie).
In rode the Lord of the Nazgûl. A great black shape against the fires beyond he loomed up, grown to a vast menace of despair. In rode the Lord of the Nazgûl, under the archway that no enemy ever yet had passed, and all fled before his face. All save one.