Most of the RP document is talking about 3 sites setup.   I was wondering does RP support this kind of typology.  

Basically the scenario is existing setup involving SITE A > SITE B, we need to migrate data from Site A to Site C.    We also need to replicate a copy from Site C to new DR site at Site D.

Site A > Site B

Site A > Site C

Site C > Site D

My plan is from Site A existing CG (already replicated to Site B), add a copy to replicate to Site C.   Once the site C replication is done, I will perform a failover from Site A to Site C, get rid of site B.   setup the CG to replicate from site C to site D.