I've been doing some research into Transformer lore and I believe that the info I found as well as my own theories can explain 4 things about ROTF that don't make sense to all who saw the movie. 1) The Constructicons, Demolishor, & Scavenger: Why were there duplicates of Long Haul, Mixmaster, Rampage, Scrapper when Devastator was formed? 2) Bonecrusher: Why was Bonecrusher at the battle at the Pyramids in spite of what happened to him in the first movie? 3) The hatchlings onboard the Nemesis: How were the hatchlings created? 4) Megatron's Resurrection: How was Megatron resurrected by a shard of the AllSpark when a great portion of energy from the cube itself killed him in the first movie?