Just watched Scarlet Johansson in Luc Bessons "Lucy".
Lots of fan service certainly.
VERY VERY VERY DUMB...
Also, in many ways it goes far beyond "homage" and into "total blowjob" territory for Yuen Woo-Ping, John Woo, and Park Chan-Wook... and to Hong Kong and Korean (and of course being a Luc Besson film, french and italian) cinema in general... To the point of some shot for shot "homages", and very explicit callbacks and stunt casting.
Frankly, that was part of the fan service.
I didn't like ScarJo's performance choices and/or Bessons choices in directing her performance... but that was a matter of personal preference and taste. I don't think it was actually a bad performance, I think she was executing what she and Besson wanted... I just didn't care for those choices.
It was REALLY short. It also made very extensive use of stock footage; to the point that I think without it, the whole film minus credits (it's listed as 90 minutes with credits. We timed the actual film content as 83 minutes from opening shot to closing shot) would have been under 60 minutes.
Fun. Not good. Not so horrible as to wrap around and be great.
If you're a film geek... particularly if you love hong kong and korean action movies it's a good "bad movie night" movie