Hi Faheem,
we already discussed a few possibilities (also enhanced features with cross-platform transportable tablespace) in this SCN thread: Can we use SAP SLT for platform migration ?
However Oracle Golden Gate (O2O Triple-O - details in SAPnote #1508271) would be another option. By the way Oracle Streams will be deprecated with Oracle 12.1 and you should use Oracle Golden Gate instead - so the Oracle product path is clear.
Regards
Stefan