Merge two datacenters (storage migration)

Hello.

This is RHEV 3.2 environment.

The task is to merge DC1 and DC2 into one DC. I know that supported and documented method is to use export domain.
However I am wondering of other method which could go like this:

1. Create fc storage pool (SP1) for DC1
2. Move all VMs to SP1
3. Shutdown all DC1 hosts.
4. Destroy DC1
5. Add DC1 hosts to DC2
6. Present SP1 luns to DC2 hosts

Would it work? How would RHEV-M behave if it saw luns with the correct lvm structures with data on it ?

Thank you for any suggestions

Marek