The best replacement for iron man 3 is man of steel.

The best alternatives to iron man 3 are rated as following:
★★★★★  man of steel
★★★★★  dark knight rises
★★★★  iron man 2
★★★★  thor 2
★★★  man of steel box office
★★★  star trek
★★  captain america 2
★★  captain america the winter soldier
★  incredibles
★  oblivion
  star trek into darkness
  tdkr
  great gatsby
  fast and furious 6

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Speaking about iron man 3, one probably shouldn't forget about andy lau.

Other search terms related to iron man 3 and their ratings are:
★★★★★ andy lau
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iron man 3
man of steel
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