I can see it now. The Lupin gang steals a weird artifact that said to lead to the future. Lupin didn't believe in such a thing so he starts messing with it. The artifact glows and teleports them to the future where they have to steal the stuff they need to get back home. They would get a bounty and The Bebop crew would go after them. The first fight would be against Goemon, Ed, and Ein. Goemon vs Ed and Ein would be interesting. Ed would hack all the technology against Goemon and set up traps. Goemon would destroy a lot the things, but he would never get to Ed and Ed would never get Goemon. The next fight would be against Jet and Jigen. Jet vs Jigen would be really cool too. Jigen would have his gun and so would Jet. They run into each other and chase each other into an abandoned area. They have a gun fight, eventually the cops would show up and they would both retreat. The next fight would be Fujiko and Faye. Fujiko would use her cunning to try to lose Faye, but Faye would be hot on her tail. Fujiko hijacks a ship and they would fight each other. Faye would mention that they look familiar, but couldn't put her finger on it. Then the grand finale would be Lupin and Spike! They have a good chase scene in which they pull every trick they have in the book, but it doesn't work. Then they get into the actual fighting. In the end both are beaten pretty badly. Then the rest of the two groups come to help. They have an all out fight, but are then forced to retreat. Later, the Bebop crew would be discussing a plan. In the middle of the discussing, Spike pulls out his gun and points it at a dark corner of the room where Lupin is hiding. Lupin tells them the story and they don't believe it. Then Faye steps in and say that he is telling the truth. (Lupin the flirts with Faye, then Faye slaps him.) Lupin asks for their help, then they team up and realize they are a lot alike. Eventually they get Lupin and the others to their correct time. Lupin and Spike both say "Maybe life isn't so hard. I only have to deal with these guys instead of him. (Zenigata and police force for Lupin, Bounty heads for Spike.) Now I have some new tricks up my sleeve. I'm looking forward to the future!" Then credits of them all together having fun. The end