Question: I am wondering is there any options for combining existing *ARCore* early stage with Google Location in order to place AR objects over `latitude / longitude` in the real world? I know this one is possible with *ARKit* but haven't found any information on such via *ARCore*.

Any ideas?

Thanks in advance.

Answer: 
I think that this is not 0/1 type question :)

First of all ARCore is SDK only for mapping the surrounding. It has no computer vision and/or location capabilities. 

Your request is possible but you must combine two elements. First you need to work with location (GPS) and calculate that selected location lat/lng is in your view. This quite simple, you can find a lot of tutorials about that.

Than when you will be sure where this point is ( you can also calculate the bearing that will help here) you can use ARCore to pin the 3D model to the world. Probably you will have to make some kind of transformation to change the real world coordinates to your screen 

Making the answer simpler: ARCore itself is not able to that, but combining different tools will allow you to achieve this goal
I use mapbox, with arcore, you just have to do the "magic" ( when nearby location, transition to ar core scene, and put GO at approximate location ) 
I used player position, and orientation, than it lays out the level in front of the player, at the feet, with a raycast to the ground, It will only spawn if the ray actally hit a plane(tracked plane), making sure its on the tracked plane