I don't think Luffy is getting out of this completely unscathed. Kid took an L, Law took an L, I feel like Luffy needs to take an L too. Not because his rivals did, but because it just makes sense storywise.
Luffy just beat the WSC. So for there to be tension going forward, you need to establish that there are still threats Luffy is yet to overcome. Imo Teach/Saturn are a perfect opportunity for this.
Obviously tho, Luffy's L won't be nearly as bad as Kid and Law's. I think Luffy will be embarrassed, possibly even defeated, but his crew will escape and he'll keep his poneglyphs.