The best replacement for prince2 is pmp.

The best alternatives to prince2 are rated as following:
★★★★★  pmp
★★★★  pmbok
★★★  pmi
★★  agile
★★  itil
★★  apm
★★  capm
★★  msp
★  apmp
★  six sigma
★  scrum
★  pmp which is better
  pmp certification
  pmi certification
  pmp comparison
  iseb
  lean six sigma
  pmi pmbok

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Speaking about prince2, one probably shouldn't forget about agile.

Other search terms related to prince2 and their ratings are:
★★★★★ agile
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prince2
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