I don't know under what circumstances any of these would ever happen, but the idea of the Coopers having team ups with the villains from Sly 4 wouldn't leave my head.
It...it's just so...I can't even! XD
I only have two done so far. This one and the one with Galleth and Penelope. 83
If Tennessee and Toothpick ever teamed up, they would still fight like little brothers. Of course, there's the issue of getting that Armadillo's trigger-happy-ness under control. I mean, hot dang.