User blog comment:JediSpectre117/Regarding the surviving Prothean./@comment-1221773-20120218211447

1. Per the art book, the discrepancy between the Ilos statues and the ME3 Prothean is pretty much a retcon. The Ilos statues were indeed intended to depict Protheans, but BioWare wasn't sure how much they would be showing Protheans in the game so they made the design somewhat vague. By ME3, BioWare decided that they wanted Protheans to look like Collectors.

2. I don't know about this. Maybe if we encountered the Prothean just wandering around somewhere there might a be slight chance he could be mistaken for a Collector, but if we find him in a Prothean stasis pod inside a Prothean ruin, it would be a stretch for him to be mistaken for anything other than a Prothean.

3. I agree. We'll have to wait and see if ME3 includes such interactions.