I have asked 3 people who work at SAP & none of them knew the answer, but here is what I have heard & not been able to confirm...
If you are a company, and you do not have SAP at all, you have to get SAP HANA, you cannot get SAP ECC 6.0. If you are a company currently running SAP ECC 5.0, you can upgrade to ECC 6.0 EHP7, & then later upgrade to HANA. However, if you're a company running anything older than ECC 5.0, i.e. R/3 4.6B, 3.1i, etc, you CANNOT upgrade to ECC 6.0, you have to go directly to HANA.
I keep hearing, "that sounds right," but NO ONE has been able to confirm this is 100% true (or false).
If anybody knows for sure, please let me know, & I will pass the info on to SAP, who apparently is not interested in training its Sales & Support personnel.