I'm not sure if this can work. What if u render yr image with alpha.
i. Bring it in C4D or 3D max.
ii. Create a black floor with yr images texture map on flat plane board and position it on top of the floor.
iii. Put higher reflection for the floor so that it can pickup the images from the plane board.
iv. Render only the floor (with reflection), bring it in AE and apply screen mode.
v. So now u have real reflection then.. :) and u can distort it slightly to align the reflection.
Sound crazy, but it worth to try..
Regards,
AESheriff
http://aftereffectbasic.blogspot.com/