The only fight which makes sense for Khabib at 170 is GSP.
GSP will not come out of retirement if there is no belt involved, he is only looking to cement his legacy and for that the UFC has to either create a 165 division or GSP has to come down to 155 pound which is a hard task as he never tried.
As far as Cowboy vs Gaethje, I believe Donald can get back on a good track and attempt to get another title shoot down the lane. Granted, he was getting busted by Tony, but I saw good things.
If Donald wants to fight for a title he needs to choose his fights rather than fighting all the time, the damage he took will come back to haunt him, it is a tough fight for Donald as he usually starts slow while Gaethje starts right from the start which is always a threat for Donald Cerrone.
We've also got Conor asking for a rematch on twitter, 250k retweets already, and people say "nobody wants to see that rematch".
No one cares about Conor now, if you check his social media page, he is calling out everyone and now Dustin Poirier responded, lets see how that will go.