The A380s may return but it would be because airframes are needed quickly, rather than because that particular type is needed. Having a large fleet already parked, with the infrastructure in place makes a return to the skies fairly simple. Even if they all fly again, it may not be for a prolonged period. A certain number will remain depending on the business case, ie how many can be operated profitably. The B787s on order come in nicely below the B777 which gives a reasonably versatile fleet, possibly narrow bodies could be considered as well.
This pandemic showed up EKs over reliance on premium long haul transit traffic, the sector which will be the last to recover. A more diverse fleet would enable a wider market to be covered which is what is needed going forward. Relying on full first and business class cabins in large aircraft won't be possible for a number of years.