I see two scenarios.
1) He somehow sits down and waits for Luffy to recover so they can have on final clash.
- Lame. But even Katakuri turning into a Luffy fanboy was lame, so...
2) A win is a win. Victory cry + Den Den Mushi victory announcement, and while he's about to kill Luffy for good... Marco comes to the rescue to buy some time for Luffy to recover.
3) The scenarios that actually happens. ---> Find out next tuesday in the spoiler thread.