Tango and Cash reunited in this movie
If you get the reference to who i mean.
"Unicorn, mermaid, vampire,sorceress! No name you'd give her would surprise me i love whom i love"
We don't know if they share a scene together.
At Comic Con, they brought out Harrison Ford, Mark Hamill, and Carrie Fisher to promote Episode VII. They didn't actually appear onscreen together.
The Force Awakens - The Last Jedi - From His Nap