Placing geo-specific building models from modeling tools into a geodatabase is a critical part of the city modeling workflow. Collada is one of the best and most ubiquitous formats for exchanging models of this sort. This operation is very time-consuming because collada models come into arcmap without any scale or georeferencing and so a user has to go through a very pains-taking and error-prone course of adjustment each time each model is imported.. Many modeling programs are capable of attaching georeferencing to COLLADA models via KML or KMZ - -which are open, stable standards governed by the Open Geospatial Consortium. Arcmap itself will export COLLADA with the apropriate georeferencing via KML, but it will not import these (unless I am mistaken (and I hope I am!!!))
Please add the capability to import collada files with georeferencing via KML or KMZ.