Followers of this site on Twitter and Facebook weighed in with their answers, and here’s what some of them had to say (un-edited)! Surprisingly, the answers were extremely varied. Guess the whole movie’s going to have to impress to keep everyone happy.
@TeamHPTwilight -- When Bella finally lets Edward read her mind.
@RJCarreno -- Bella finding out about Jacob imprinting on Renesmee.
@Sj_Twi13 -- When Alice has the vision 'bout the Volturi.
@AvaTwilighter -- When Bella holds Renesmee for the first time after the transformation
@CosmicGirl78 -- I'll have to go with the Cottage scene, there has to be a huge wardrobe
@KRayesMom -- Bella, Edward, Jacob and Renesmee goodbye when they meet the Volturi
@JessNWheeler -- Bella & Emmett arm wrestling.
@Totally_Dazzled -- Bella using her gift against the Volturi and making them retreat
@Cornix_Regina – the first time Charlie comes to visit after Bella becomes a vampire
@Twilightifully – Bella's first hunt!
@Twi_Rob_Kristen -- When Bella is training with Kate and she manages to expand her shield
@SarahRic -- I want to see Bella's confidence when Jane realises there's a shield,human Bella doubted herself so much!
@CosmicGirl78 -- I would also like them to get those scenes where Nessies show them things with her touch right too :)
@DonteAroJr -- The perfectly graceful and uniform entrance of The Volturi when the enter the clearing!
@BruniLovesKstew -- Edwards and Bellas first vampire kiss
@ILuvFanFic1011 -- When Jacob is going to leave w/Renesmee & Edward says "Goodbye Jacob. My brother, my son" Hope that line is in there.
Laura L. -- the rate in which reneseme grows up i reckon.
Eileen B. -- I want to see Edward playing the piano.
Barbie S. -- When she first "awakens" as a VAMP
Ronica S. -- When she really gets control of the shield and uses it with all her power.
Be sure to weigh in with which scene you think is the most important to get just right in the comments below!