"...making it compatible with both the iPhone 6 and iPhone 6 Plus and likely other iOS devices with Lightning connectors in the future."
Until Apple releases a incompatible one that is. They always do.
Just when u think this will be "the one" they change it... Apple make think this is going to be around for a long time, but USB-C will replace this.
Apple has changed the dock connector type exactly once in the entire history of the iPhone/iPad. That is an exceptional track record. Moreover, there is no reason to think Lightning is going anywhere. It clearly was designed with the intention that it would be around for years.
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so u'r basing this on what previously been done ?
To respond to a comment based on what Apple "always" does, one needs to consider what previously has been done. Obviously.