Amy Winehouse Biopic 'Back To Black' Drops Trailer, More Mixed Reactions

Marisa Abela's casting as Amy Winehouse has been pissing people off for about a year -- and loads are STILL fuming after the trailer for the biopic dropped ... can't win 'em all.

As far as we can see, Marisa's not a dead ringer for the late icon ... but she's close enough -- going from an average everyday Londoner to a beehive-wearing, heavily-tatted powerhouse in the first international teaser trailer for "Back to Black," showing her rise in the biz.

Some refuse to cut her slack, with a crap ton of haters hitting X with their fuming takes on Marisa's casting & also predicting the movie will tank at the box office. Long story short -- a lot of users feel she's just not believable as the late, great AW ... both in look, and in voice.

It ain't all bleak, though -- others admit they're pleasantly surprised at the trailer ... enough for them to make a theatre trip -- adding that it looks super emotional.

The trailer definitely stirs up some poignancy ... Abela's Winehouse is heard saying she doesn't pen songs to be famous ... only doing it cause she doesn't know what else she'd do if she didn't.

She also hopes people forget their troubles when listening to her voice -- which arguably they did as Amy's music touched millions before her tragic passing at 27 from accidental alcohol poisoning in 2011.

The mixed reaction to the Sam Taylor-Johnson-directed biopic doesn't come as a surprise as Amy fans have been venting for a while over Marisa looking nothing like the star -- also slamming the need for a biopic in the first place.

Though, Amy's own dad Mitch is totally cool with the biopic ... telling TMZ early last year Marisa's a great choice for the role -- even if she doesn't look exactly like Amy.

Jack O'Connell plays Amy's husband, Blake Fielder-Civil, and Juliet Cowan & Eddie Marsan play her mom and dad, Janis and Mitch Winehouse.