Am working on devising a migration strategy for several Oracle databases from one physical data-center location to another data-center location through dedicated WAN links. Overall snapshot:

Total 365 Dbs (28 to Oracle RAC 11gR2 and approx. 300 to DataGuard and Standalone). Source Databases versions are Oracle 9.2.0.4/9.2.0.7/10.2/10.2.0.4/11.2/11.2.0.4.
Source Databases are currently on different versions of Linux/HPUX/AIX/Windows OS. Target Database OS platform(most of them): RHEL 5.8/RHEL 6(atleast for Unix) and Windows. Plan is to migrate same versions and not upgrade(due to applications dependency). am thinking of using

-Oracle Datapump
-Transportable Tablespaces+RMAN scripting(for target datafiles)
-Shareplex for Databases in TB (this tool allows ZDT, zero-downtime migration/from Quest software)

Also my Storage/SAN colleague is using Swing gear (AUTO-LUN+BC) to migrate virtualizing the storage arrays from Source to Target location. Is it possible to "piggyback" on this SAN-level migration of the "physical" datafiles and then use Shareplex to migrate the archivelogs and apply them over to Target databases?

Need your inputs please. Thanks in advance..

Abhijit