I think the undead players (whom you have re-animated) will prove quite effective at de-braining the living elite right out of the opening (which Carlsen will still not prepare well enough for because he's cool like that).
So with the undead left at the table ... My vote goes to Zombie-Tal (who'll be more of a 28-days-later zombie than the rest of the slow moving Romero-style zombies.)
the 16 undisputed Chess World Champions duke it out in a torunament format, who becomes champion of champions
Pairings- Steinitz vs. Carlsen
Lasker vs. Anand
Capablanca vs. Kramnik
Alekhine vs. Kasparov
Karpov vs. Euwe
Botvinnik vs. Fischer
Smyslov vs. Spassky
Tal vs. Petrosian