Meh....
Maybe it goes down like this....
He goes with Saul’s “witness protection plan”, takes the fam, moolah and 300 to Belize and what we saw was a sneak back to old haunts off the record....
Hmmmmmmm? Sound possible?
Partly maybe but he’s still hosed. He’s still known, and he bought a big gun and retrieved his poison smoke so there’s some retribution he’s aiming for. Really the gunfight has put him in a position where there’s no winning. If Hank survives Walt is under arrest, if Hank and partner die Marie knows Walt was there so there’s no hiding it. And I don’t think there’s any way Skylar is leaving her sister a grieving widow to lamb it with the fat cash which will now be very much blood money. And getting the fat cash is going to be rough since it will now be at the scene of a multiple homicide of DEA agents. Plus of course in that scenario has guns pointed at him with blood on their hands and no reason to let him live... except his ability to cook. He’s hosed, there’s no pulling a Walt on that gun fight, no chemistry trick or fast talking is going to make both sides walk away unscathed with him free.