For array base replication with VM ware site recovery manager we use SRA adapter v3.2.1  with Storwize. Do you think that this would support a stretched storage integration  with hyperswap volume? 

Hi Liz - The question in the body of your post seems to be "Does the SRA 3.2.1 support Hyperswap?.  Here is an extract from the release notes showing support for Hyperswap was added in SRA 3.2.0:

Version 3.2.0 (April 2016)
Version 3.2.0 included the following enhancement and fix.
Ticket ID
Description
VMSS-260683
Enhancement:
Implement SRA support for local hyperswap, starting with Storwize family firmware version 7.6.

Here is a link to the full document:

https://delivery04.dhe.ibm.com/sar/CMA/SDA/06gvj/4/Storwize_Family_Replication_Adapter_3.2.1_RN.pdf

However, the title of your post is "Should I do Hyperswap for this?".  That is a different question that requires information not provided like:

What are your recovery requirements? (RTO, RPO...)

What does your network look like between your two locations?

What is the distance and latency between your two locations?

If you would like to talk through the pro's and con's feel free to reach out.....