Will Sengoku Back Up Garp?

Now that Garp freaking nuked BB's island, they will surely fight. It will be a hard battle and I do think Garp will lose. Even worse, die. No offense to the marines who accompanied him but I don't see them being equal to members of BB's crew. So do you think his best friend will help him? Or maybe they will just rescue Coby and get out of there?