I'm trying to figure the relationships and possible plans between these 3 characters. I'm a casual fan when it comes to the movies so I might not know all of the info. Was Megatron supposed to meet up with Sentinel at the behest of the Fallen? Or did Megatron make a side deal with Sentinel and they both got side tracked, Megatron crashes in the arctic and Sentinel's ship tumbles through space and finally lands on the moon. Was the sun harvester originally plan A and when that failed Megatron went to his back up plan with Sentinel?