There is one inviolable 'rule' as an expat and that is that once you have a command, never, ever give it up for another expat position. Give it up to go 'home' to a legacy carrier if it feels right but never give up your command for an expat F/O job.
You therefore have a big decision to make, and fairly quickly. I don't know enough about your specific situation to comment in detail but if you are being offered, or will shortly be offered, A320 command, I would be inclined to take the command. Ask yourself this: If the aviation industry experiences another downturn, where would you be better placed to get another job; as a A320 captain or A380 F/O?