As we know Garp has been captured by the Blackbeard pirates, and what we last saw of Law in the anime he was just about to confront BB at sea, with only a 4 man crew as well as still not fully recovering from his injuries from the raid on Onigashima.
Law preparing to Fight BB.
BB looking down on Law’s small ship.
I think it’s acceptable to say that Law will likely be detained by the BB pirates at this point in time, and if not, he might be about to free all of BB’s prisoners, however I find Law not be captured quite unlikely. Both Law and Garp have likely been detained, and are likely facing grave injuries, however they are also likely detained in the same place. What I believe is possible is that though Garp is essentially dead, and may never recover with the assistance of a regular doctor.
Garp, slowly dying to Aokiji’s ice, while surrounded by Blackbeard’s crew.
The surgeon of death may be able to help, with his awakened devil fruit he might be able to synthesise Garp’s destroyed organs, as well as nurse him back to normal health, as well as attach each part of his chest that was ruptured.
Law while his currently attached arm is not attached.
This seems like an event that will happen in the distant future, something that might happen just in the nick of time for the SH crew a they run into trouble and a newly healthy Law and Garp show up to save the day. Garp must surely play more of a part in the story and Law is too much of a fan favourite to die so early in the final saga. What I’m trying to say is, don’t write Garp off just yet, as Oda has seemingly written him a lifeline that just might work. This idea seems iffy in many places, like how law will get Garp off the icicle without killing him, how law will even get to he icicle, and how Law will manage the operation as well, however, Oda has written many Iffy moments before and explained them really well.
Iffy arc/Saga.
Iffy Devil fruit awakening.
Iffy attack… (Gomu Gomu no Kaminari)
So I have faith in Law and I have faith in Garp. And I have faith in their combined power to escape the BB pirates, or maybe even kill some major players in their crew. A possible solution for the iffiness is that Garp is seemingly being preserved by the ice, it is freezing itself around him, perhaps giving him and Law more time, and making it easier for Law to operate.
P.S. Credit goes to @Fusion D King ’s “Which Attack is the strongest” poll.