The fact that no one is responding with ideas tells you what you need to know.
> AR expertise to do, well, something
Is it really a big expertise now? I think it was a big deal when they started those face filters but now even small players have that stuff. For example, hike: https://play.google.com/store/apps/details?id=com.bsb.hike
Good luck to the team though. It must be a stressful time there.