Hi Subhro,
I don't believe that SAP has any plans to put this content onto SAP PI, since I understand they are hoping to bundle HCI with EC instead of Dell Boomi AtomSphere. However, this is not confirmed right now. I would like the content to be available on SAP PI, but I don't know if this will happen and I wouldn't make any assumptions until you hear an announcement from SAP (should one happen).
With regards to your last statement, if HCI is bundled with EC then there will be cost for the middleware. However, there may be training based costs associated.
Best regards,
Luke
